One of the fun things about having both casted and instant spells is that they pretty much hit at exactly the same time. Add in Auto Shot and crits and it becomes really fun. While leveling my hyena in Firewing, I happen to have an instantaneous kill. Three shots hitting and critting within one second of eachother, and the mob instantly dying. It was very cool.
I know others have probably had it happen on other mobs and definitely have bigger numbers to show off, but this happened 2-3 times that play session. Three big numbers exploding over a mob followed by a death groan. Who would have known it would make me so happy.
Also my hyena is now 70 (pic is now up). I should be testing him tomorrow.