An elementalist who would have a rotating buff that works similar to Demon/Ice King. Each turn your resistances switch so you can plan ahead depending on the Battlefield. Also the spells you use deal bonus/less damage and the cost is lower/higher depending on the current buff.
An Illusionist/Mentalist archetype. Who distracts enemies or turns the tables by mind controlling enemies for a temporary duration.
A Curseslinger who's job is to make the enemy's existence a nightmare. Weakens, slows, cripples, terrifies, poisons and of course curses the enemy and gains a random buff for each affected enemy. Took that idea from 5e. Maybe his big 3 Source P. spell would be a transformation into a Night Terror with a Blinding aura (to emulate the darkness around him/ terrify aura sounds too strong) who terrifies enemies with a 10% chance on-hit.
A Samurai class with stances. One stance gives him increased melee range and a bonus to cleave damage. Another stance lowers his movement speed but gives him increased crit chance+ crit damage and the last one lowers the AP cost of regular attacks by 1. Something like that.
