Berkut

Build Name: Prideful Douchebag {Lv.40+10}

This build makes the best out his, mediocre at best, stats. This is one of the only builds that I can come up with that allows Berkut to actually win on his own.
His lance creates a nice little way of tanking magic users, distant counter allows him to attack both close and ranged magic people, panic+his HP creates reverse bonus effects upon enemies, and fierce stance boosts his chance of actually killing someone when attacked.

A build I am working on getting at the moment.
Holy Grails really opened up the free units for more potential and better builds.

This Berkut is made to counter mages.
The higher the res, the better.

Berkut's Lance with +Res refine is obvious, more res.
Reposition to help move allies closer or further from enemies.
Aether to help get health back and allow for a bit more damage.

Distant Counter to help counter mages.
Quick Riposte to allow two guaranteed hits when foe initiates.
Even Res Wave to allow more res, of course.
And, Res +3, you get the idea.

Mixed tank build for Berkut, fully merged at 3* he reaches 36/36 defences during the enemy phase and bumps his attack to 53 while he's at it. This, combined with his high HP means that Berkut will survive most encounters if you're smart with him.
It's a rather straightforward build, but it turns him into a great tank for a cavalry team. Berkut is a hero who gets way more hate than he deserves.

Berkut isn’t really the best of units.
He can be easily outclassed by many other lance cavaliers.
However if you intend to use him then I could share a build I experimented on.

Now looking at his weapon I picked up, it’s Harmonic Lance+ with an atk refine. To answer your question, yes. I am currently out of my mind. The sacrifice is worth it in my perspective. The lance offers a +10 damage when special triggers.
However, if you don’t have a Shigure to skill inherit, then Berkut’s Lance+ offers the same might with the atk refine. The only difference is that Berkut’s Lance+ gives +7 res when being attacked.

Reposition is here to abuse the movement range of a cavalier.

Dragon Fang is great on units with high attack. Berkut would easily get to 51 atk with the weapons above. Dragon Fang would increase it with 25 atk, making it 81 atk when it triggers. If you choose to make Berkut summoner supported, then his atk would be 53. With Dragon Fang triggering, it would increase it to 26 instead making it a total of 79 atk. If paired with Harmonic Lance+ with the atk refine, your damage gets a fixed number of +10 damage when special triggers. You may use Draconic Aura if you wish, however we are going to be using a Heavy Blade 3 sacred seal meaning that Dragon Fang is more recommended. The sacred seal decreases the special counter by 2 (instead of 1) per attack. This only works if you do have at least 2 or more atk than the enemy you’re facing. With 51 to 53 atk, I think you wouldn’t really have too much of a problem with it.

Now we go to the A slot. You may use skills such as Brazen Atk/Spd 3 or other Brazen skills as long it increases atk. But if you don’t have any fodder with those skills then you might as well use Fury 3 as replacement. Fury 3 increases all stats (except HP,) to +3. Though you get 6 damage to your HP after combat regardless of situation. Brazen skills increase two of certain stats that have been mentioned in the skill name by +7. Though it only activates if your HP has gone below 80% and during combat.

Going to the B slot we have either Vantage 3 or Lancebreaker 3. To use which one would mean to look what A slot skill you chose. If a Brazen skill is taking the slot, then use Lancebreaker.
What Lancebreaker 3 does is to double attack a unit and the target unit can only attack once regardless of spd. This only works if you’re above 50% of your HP. If you have the Lancebreaker and Brazen skills as your setup, then Berkut would be at his strongest against lance units when in between 50% to 80% of his HP.
If you have decided to use Fury 3, then use Vantage 3. Vantage 3 lets you attack first when you’re below 75% HP and you’re being attacked. This pairs well with Fury 3 because of the recoil damage after combat.

Berkut’s C skill can be anything, as long as it makes sense for Berkut or for the team he’s in.

Before ending this, while this is optional, having a staff cavalier like Maribelle or Priscilla on Berkut’s team optimizes his overall performance. (Note: I summoner supported him and it shows his Brazen skill activated. lol)

What’s up guys, Ridragon here with a question: have you ever wanted to use someone that wasn’t Reinhardt for PvE content? Well, here’s your chance!

Shell Lance is for the sweet initiation bonus, and the Atk Refine helps Berkut kill things harder.

Reposition for the Reposition Gods.

Draconic Aura is a large burst of damage, especially off Berkut’s good Attack.

Death Blow lets Berkut kill things even harderer.

Desperation is for those times you see Arden in your Chain Challenges.

Threaten Defense lets Berkut be so intimidating that every enemy just wants to die as soon as he comes close to them.

Brash Assault ties in with Desperation, so he can consistently double 1 Range enemies once he gets poked a few times.

And now, you have the best Blue Cavalry!