Generally, I feel like the Paper Reagents needed for casting spells are a bit expensive. 500 silver each. You run out quickly, 500 per trip. I say today alone i spent about 1.250m silver on 2000 charms or so while questing. The skills seem, with that investment, a challenge to grind stuff with.
They weigh alot too.
Storm Calling seemed not to last its entire duration. I use the skill (at lv1, duration is 5 seconds) and it seems to be only out for 2-3.(feels like it glitches). Like prematurely deactivate.
Creeping Death Charm has 3 over heats, and takes 3 charms each overheat use. For what it does, I feel like it shouldnt take more then 3 charms each cast. But rather 1 charm per overheat use.
This is my perspective.