Rhajat: B!Lyn and Reinhardt check build idea

If the point is to JUST check Brave Lyn + Reinhardt, then would't Bowbreaker be better? Dull Ranged is pretty expensive when the only thing you'd be doing (or I guess the whole point of building the unit, rather) is to get rid of these two units when you could just use Bowbreaker.

Brave Lyn with Neutral speed hits 35, so unless you buff up Rhajat's speed with something like Hone/Spur/Drive, then you wouldn't be doubling her, whereas Bowbreaker kinda solves that problem by itself. And that's without taking into account Mulagir, which gives her an extra 3 speed, and Swift Sparrow, which is 4 more speed.

I think your better bet is take the +eff refine, which opens up your B-slot, and use bowbreaker or even vantage.

The matchup against Reinhardt is probably a win, but it's going to be close if he's using quickened moonbow. +atk Reinhardt with death blow needs 4 merges to do just enough damage to beat you if you have no seal and no buffs. If you're in AA this probably will never be a problem because you just make sure she has a teammate with spur res and you're fine.

The toughest matchup will be against brave bow B.Lyn, especially if the cavalière has an atk boon. Even without, she normally has you beat using swift sparrow. 33+7+4 = 44, and your def is 27. 2x17 > 33. So again, you need some teammate to rally def/res on her, or you need somehow just a wee bit more def.

If you double up on distant def using the seal it looks to me like you have either of them cleanly beat; the only question that will remain is whether you can take them both without some teammate donating their HP.

I have +atk -def ivs and my build is

Keen gw(effect)
Luna
DD3
Vantage
Threan res
DD3

It works well and you typically one hit ko both,so having vantage lets you safely get both kills.