Alright so on my sorc, my set up looks like this-
I apply 2 damage over time bleeds on the target or I do aoe (my second bar is aoe) but both bars have Crystal Fragments from the dark magic tree, and Mages' Wrath from the storm calling tree. And the reason I like that is because crystal fragments seems to do a lot of damage and it's a good filler, and then mages wrath is an Execute and does a lot more damage if used just before getting the target to 20%.
The problem with that is... Mages wrath, like, for some reason, just... does not want to cast, 9/10 times. If I just get done casting crystal fragments (or any other spell for that matter), the game basically is forcing me to wait 1 or 2 seconds to be able to cast mages wrath. It doesn't let me do it right away. Like... ??? What?
For reference none of my other characters feel this way. On my DK who uses 2 handed sword, I can do Disintegrating Dragonfire (the firebreath) and then IMMEDIATELY do Executioner, no waiting at all. It is so smooth. And for that reason, playing my DK is a lot more fun than my sorc.
Is it because on the sorc I am consecutively using class abilities? Whereas on the DK I go 1 class ability leading into a weapon ability?