Best Character Cards for Cannoneer (post revamp)?

You could switch out zero card for kaiser if you were bossing. Mine is only 40 str so it's pretty trivial. For eunwol question...maybe replace xenon like i am?

Yeah, but as I said in OP, everything should be consider as SS rank since all of those cards are already SS, if I need anything outside of what I already have, I will make it to at least SS rank.

I am also doubting the usefulness of a SS Mech card since it doesn't effect epic adventure while most other buffs do not have CD associate with it.

By switching out Xenon and AB, I would lose 40STR and 120DEX.
I can see the usefulness of 20% summon, will those 20% benefit me more than the 40STR and 120DEX?

Thanks once again.