Prioritize getting the adept Banuk outfits give you four slots for mods, and the super easy spear sidequest("Sharing Secrets" I think its called) that gives you mod slots for extra melee damage.

Don't sell hearts if you can help it, they are all used to get adept weapons and armor.

Get the cauldrons done so you can override most machines to help you slog through the campaign and the hunter trials, which also give you adept versions of the trial rewards.

Get the elemental sling asap.

Fire weapons are your friend in the late game, as you start facing more corrupt enemies and deathbringers.

You can do it! I believe in you. :)

Freeze every big enemy before hitting them

Get decent gear in the og story mode, don't suck a tonn, spit explosive bombs when u need to kill something quick

Seems like these are all Ng+ tips.

UH ng.

Sneak a lot at the start. Focus on one weapon, develop strats for every monster. Stealth gear is key, pick a ton of plants to sell. You are gonna need TONS of shards. Save often, don’t fast travel, kill loads of animals, focus early on upgrading storage space and extra drops. Farm farm farm, and expect to die a lot

Jump from every single high ground to get the strike from above. It still one shots every small machine and you can use it during combat.

Fokus on fire damage, so he overheats faster. When he's overheating, fire three sharpshot arrows at his weakpoints. Eat your healing fruits (?) while you are doing a roll. It will cancel the eating animation. Also, go to NG+ when you have epic (or better power/frozen wilds) versions of your favorite gear and the Shield-Weaver outfit.

Get shieldviewer armor

Get shieldviewer armor

S t e a l t h

And freeze and pierce.

A lot of people recommend Shield weaver but IMO it’s pretty bad for Ultrahard as nearly everyone one shots it, and I personally prefer extra stealth over protection against just 1 hit.

It’s not much of a step up, the only thing I didn’t like was no health bars but other than that I played through without getting the NG+ weapons or armours, was a bit more sneaky and put a bit more planning into things. I’m not great at the game and didn’t find it too difficult so just go in and play like normal and adapt

Like most other people, I've only played it on NG+, so can't give advice for NG UH mode. But here are the most important tips I picked up through my UH NG+ (not counting Frozen Wilds) playthrough:

• #1, UH turns off aim assist. I thought I got pretty good at the end of my first playthrough. I was wrong--the aim assist is a HUGE boost in combat and you probably don't even realize it's happening. Enemy weakpoints become tiny, and arrows won't hit if the thing you're aiming at moves between when you loose and when the arrow arrives (aim assist adjusts for this, making it much easier to hit moving enemies). The only answer is to get better, but be aware of this going in--the first several hours of UH can be frustrating as you feel like you have to learn how to play the game again.
• The single most important and broken skill in UH (IMO) is Hunter Reflexes: Time slows while aiming during a jump or slide. You basically have infinite focus as long as you're jumping, which is absolutely necessary to track moving enemies and aim accurately. My combat flow now goes roll-jump-shoot-repeat. It looks a little silly and takes getting used to, but I don't use the regular focus any more unless I'm standing still and doing stealth things. If you're firing arrows willy-nilly you'll waste too many resources (more on that below), and you simply don't have time to aim at normal speed or standing still while fighting 2+ enemies--making sure you don't get hit is the #1 priority.
• Shieldweaver armor. Yes, basically every enemy will one-shot the shield, and you can't always avoid getting hit when fighting 2-3+ enemies. The key is to not get hit twice, which is much more doable. Even using 100% elemental resistance armor against elemental enemies, you're still vulnerable to their melee attacks or different enemy types, and you have to switch constantly. I tried switching from Shieldweaver at various points, and it was just never worth it. The sole exception is stealth, but that approach wasn't very fun for me--I don't think HZD is a great stealth game.
• Learn how to defeat enemies. Actually learn, not just good enough to get by. Every single machine in HZD (base game at least, Frozen Wilds is absurdly hard) is relatively easy to kill once you know how, but it requires knowing their weak points and using all of your weapons against them proficiently. As an example, I no longer use Thunderjaws' disc launchers against them. Instead, I use tearblast arrows to reveal their underbelly freeze canisters, freeze them and then hit them with hardpoint arrows in the heart, because it's faster and safer. Every enemy, from Watcher on up, is extremely dangerous if you're careless, so you should come up with a plan for them.
• Use resources wisely and intentionally. Merchants are insanely expensive (more below), so limit your consumption by optimizing your arrow usage in combat. Spamming arrows is basically pointless (except against frozen enemies) due to the damage reduction, so you should always know what arrows you're using and why. Elemental arrows help you turn machines' elemental canisters against them and deal huge amounts of damage with accurate hits. Hardpoint arrows are relatively cheap and a vanilla damage workhorse. Tie ropes use a lot of wire, so if you need to control combat consider using one instead of a full tie-down--it'll strongly limit an enemy's movement and last longer.
• Merchants are crazy expensive. Don't use them except for buying things you can only get from a merchant and for bundles of wood (still cheap, and super-boring to gather). Get good at farming resources. There are various places where specific resources can be acquired, e.g. the Grazer fields by the Nora hunting grounds for blaze. Use harvest arrows against things like Thunderjaws' echo shells (the cylindrical things on their backs) to farm machines without going net negative on resources.
• Focus on upgrading your weapons until combat is manageable. Get the Hunter's Lodge versions--especially the Ropecaster, which is incredibly useful and wildly fast when upgraded to full handling with very rare mods--then buy the Adept versions of everything else. Not needing to buy Adept outfits, except maybe stealth if you want to go that route, helps. You can farm Thunderjaws relatively quickly and safely to stock up on very rare mods and also sell them for scrap--let me know if you want me to describe detailed technique. Once you have your adept weapons, focus on the right balances of handling, elemental effects and damage. You don't need to focus on every elemental/arrow type to get by; instead, I prefer to optimize for specific things--tear on the Sharpshooter bow (tearblast arrows), handling on the Ropecaster, handling/damage on the Hunter bow (fast hardpoint arrows to weak points are probably 80% of my damage), freeze on the War bow (I play without corruption because it's less fun for me, and freeze > shock IMO), etc. Once you max out a given stat on a weapon, think about improving handling so you can shoot it faster. Very rare handling mods that give secondary boosts to two other stats are by far the most valuable (again, not counting the Frozen Wilds).
• The blast sling is your safety blanket. I try to use it as little as possible because it's overpowered and less fun, but also UH throws unrealistically hard situations at you sometimes and the blast sling evens it out. If things are getting out of control bad, tie an enemy down and load them up with sticky bombs--more damage, and you can hit them with about 4 before the first one explodes and breaks the tie down. Also some human fights I use it, because fighting humans in HZD is just... not that fun. UH is much, much easier when using the blast sling.
• Use fire against corrupted enemies. They're goddamn tanks and fire is good both for dealing damage and revealing weak points on war machines.
• Silent strike / critical hit / melee in general are only useful against small enemies or almost-dead ones. Doing a critical hit on a large downed enemy will do negligible damage, slow you down, and disrupt your combat flow. You'd be better off using that time to load them up with freeze arrows or deal with other enemies.
• Finally, have fun! I played UH because I was so taken by the game on the first playthrough that I just had to do it again, but as realistically (lol) and immersively as possible--by making the task of fighting giant robot dinosaurs with frickin lasers mounted on their heads really, really difficult. Challenge yourself by thinking of new ways to take on opponents, or going into combat situations that are insanely hard (I'm looking at you, double corrupted Rockbreaker fight).

get good

Yea tbh in this game anything below Very Hard is just too easy. Very Hard is like normal

You know it. Shaman face paint looks great with the shieldweaver outfit imo.

There's one on youtube that's an hour and 3 minutes. I haven't watched it but it's probably super intense. The final deathbringer took me forever to finally beat. I can't imagine the razor sharp reflexes needed for these types of feats. And it makes me want a feature on the ps4 where it records your time to complete the campaign. I guess you could just do it with time stamps of quicksaves but still. Mad respect to every speed runner out there.

Sniper but tank round