Character Card System

What would be the best 3 Char Decks for a DB?

I have 25% buff duration on inner ability.
and lvl 100 Mechanic.

Set 1: Pirate Set
Mechanic (%Buff Duration)
Xenon (+STR, +DEX, and most importantly, +LUK)
Eunwol (%Minimum/Maximum Critical Damage, Thunder Breaker, Cannoneer or Angelic Buster until Eunwol is released)

Set 2: Warrior Set
Demon Avenger (%Boss)
Hayato (%Minimum Critical Damage)
Demon Slayer/Zero (either %Status Resistance or %EXP, use whichever one you like)

Set 3:
Kanna (%Boss)
Beast Tamer (%PDR)
Mercedes (lowers CD on Final Cut)

Might be some better cards out there that I can't think of at the moment, but that's what I'd use.