Few questions on Character card deck system

Also, does mikhail have a card?

Trying to figure out which set of 6 would be most valuable. So far the best cards imo would be

Bucc: %damage
Striker: %damage
Marksman: %crit
DrK: %HP
Pally/Ice mage: Gives damage boost but I still don't know exactly how it works
BaM: Take less damage
DS: %Status resist
DB: %Avoid

Edit: After thinking about it some more, would it make sense that

Paladin: %Atk
Ice Mage: %M.atk

And Flame wiz I guess is %M.Atk as well

So for paladin it would be

B - 1.5% Atk
A - 2.0% Atk
S - 2.5% Atk
SS - 3.0% Atk