- not a Merc, but his stat boost still invluable for warriors

, possibly replaced with if he drops in price a bit

Here we already have possible (at best) +3 ATK, +3 DEF and +1 SPT boost from characters only. I thought of these as a core:

Weapons (mostly quick-activating ones):

3x - Decent chainable +2 ATK and helps get rid of Thunderblast
1x - Good weapon, chainable on all characters
1x - Defense buster
1-2x

Armor:
1-2x - against Priests
1-2x - Defense against Priests and Mages

Actions:
3x
2x
1x
1x - Necros, Admiral, Artrezil, IHAS...
1x