Mega Mage vs. Shadow - Worth It? Advice?

[WhoIsThis]

Crit is actually really important. that 17 difference is a lot of extra damage that will be gone.

It's an effective 17% loss in damage.

Example: I do 100 damage each hit, after armor is considered on an enemy. (Let's keep the numbers simple here.) I have a 10% crit. If I have 100 hits, I will do 11,000 damage.

90 shots x 100 damage = 9000.
10 shots x 200 damage = 1000.

Total - 11,000.

Versus zero crit, where I would do 10,000 (100 hits x 100 damage).