healer---
party support (heal, buffs)
or
be a nuker
both still helpfull in pt's (healers usually lvl in pts for bext experiance)
blade----
good solo lvling in high lvls such as (25+ depends if funded)
can lvl with or without party
rumors say blades will be king in PVP in late game.
(equip dependent though for dmg)
depends on what you like.
i have a blade and its fun. ( played all classes perfer blade)