Which character should I use SP reset on?

Aran skill build remain the same as pre big bang, remake the lvl 21 wa if u want to change skill build, blaze wiz the same as aran but its lvl 120 so Im guessing its for BoS only. Go with sair, lvl 100 db can be remade if u want to change something and same for evan (afaik you guys dont need to pay nx for skills, correct me if Im wrong)