For every class? Wow, really? Unless you plan on min/maxing at DB, or you're hyperalert and *can tell elemental affinity from the player sprite*, Clowns can work no-problem with the default 9 skill slots. Gypseys as well. I mean, really... AV, MS, AC, Encore, W/C (2 of the same instrument/whip, or Amp if you're hella lame), FJ, Tarot, Arrow Set 1, Arrow Set 2, Pots. Bam. Done.
Before you even consider suggesting multiple levels of AV, I ask you why your clown/gypsy isn't at least *almost* instacast.
As to why two sets of arrows... Ori fails versus ghost, so you bring Ori and Immaterial so you can't get GR'd or anything.
Okay, now that I've shown you don't need Battlemode for 1 class, pretty much ever (I mean, really, you can just sub encore and the arrow sets if you want to be able to use more songs- Apple and then bragi/sunset depending on the party- and if you're PvPing, you aren't going to ever need Apple during a fight)...
Now for another class ^_^
With most PvM duties, a wizard doesn't even need Battle Mode. I mean, take Nameless for example.
SG1, SG10, Quag, MC, emergency mana pots, tele/fwings... Wow, 3 slots left for just how you plan on dealing with banshees... FD, CB, JT is what I'd do...
"But what about health pots!!!" You're not soloing, you have a priest. You have health pots in case the priest goes AFK, you don't need them every minute of your life. If your priest is a nub, well... I'm kinda curious as to how you made it through the entrance to Nameless 3...
(EDIT) Actually, you can ditch CB for health pots... and you can swap FD/JT for SC/FBo... or even FW/?? if you want to be really creative. That, and just copypasta this for pretty much everywhere... Really, you shouldn't need BM unless you're DBing, or "doing it wrong".(END EDIT)
Anyways... I guess my point is...
You can't always get what you want.... You can't always get what you want... You can't always get what you want~ But if you try sometimes, you just might find- you get what you need~!
Yes, I did start singing as I typed that XD