/sch is mainly used with blm puppet, with sleep/nuke strat. Your sleep can lend less that 1sec after nuke.
With no resist, you can solo VT IT mobs that way, but any resist may end in death or very close.
/nin with eva set if u want solo tough things, or if you want awoid nasty aoe.
/rng for acc, i did use it while lvling pup in campaing, or for besieged.
/drk in case you need stun, but thats very depending on the mob you want fight.
/rdm for phalanx and barspell, very awsome to solo primes.
/war for dmg boost.
/dnc for usual fight,(I dont go much /dnc),but that can be an emergency cure (especially if your whm puppet gonna remove and enfeebling before cure you or if you are overloaded)
/drg for haste and jump, i dont have it lvled, so cant say much about it.
/mnk is pretty useless past 30ish, better have /war.
/blu and /whm, for the defense boost and the cure, i dont use them much.
/thf if u want some TH.
For party, /dnc for drain/aspir samba and extra cure can be good, /war for dmg. For solo, depend what you want do.