i see you havent made more skills in a long time so why dont we forum members suggest some skills for classes to give them inspiration? ill start....
Rogue: Clone
The rogue summons multiple identical clones of himself that walk right beside or in front of him. clones do nothing (except pretends to hit in combat). each clown disappears when hit or takes a certain amount of damage.
Barbarian: Revolve
the barbarian swings around at a rapid speed for a few seconds. anyone near the barb gets continous damage. the barb's resistance towards attacks is also increased.
Necro: Resurrect