Sothe or Legault

Sothe is arguably the best dagger unit when it comes to utility because he buffs his allies AND the enemies in an AoE.

Legault I can't really say much about. I don't like his weapon, and I haven't looked at his stats in a while, so..

Legault if I recollect is bulkier, whilst Sothe hits harder. Your call. But both are pretty good.

I just happened to pull a 5* Sothe on the Surtr banner. He is always useful with his buff and debuff even with a bad IV. Legault''s weapon is pretty useless most of the time very situational.

Sothe if you want to murder people; Legault if you want someone with a bit more bulk (but you'll need to invest in hit) who can use something like smoke dagger for some heavy debuffing while leaving visible buffs to something like tactics