Changes that would make your class more fun.

Bosses with more/less PDR/MDR (what's the point of having two stats if every mob/boss anyone cares about has the same for both?)
Add a bit of backwards range to CL arcs
Stop giving every class in existence a full map attack (or make them all high CD multiple ridiculous hits so they help at bosses)
Make bosses with attacks that cannot be dodged/blocked unless in smokescreen/party shield/holy magic shield or animation is avoided (like how you can get away from the stunning pillars in zakum).
Make more bosses with Von Leon's potential nullify skill.
Make an epic boss with multiple parts separated by JQs where parts will come back to life (at maybe 25% hp) if u don't kill entire boss before the part would normally regenerate that much hp if it weren't dead (to encourage partying and character control in a game where people can solo almost everything by holding down a button and occasionally using a potion).

I like the backward for cl. Itd be more fun to also have it that if it's under 6 then the lightning would be possible to go back and hit the previously-hitted target ie cl hits each monster 3 times in a mob of 2