clavarnway

I've been reading up alot on /stopcasting lately, but I'm still a bit confused on the correct way to utilize it.

Let's say my rotation is Unstable Affliction, Siphon Life, Curse of Agony, Corruption, Immolate.

Would you want /stopcasting after all of them? Or just on the instant ones, so you can get the next spell in there ASAP? I'm annoyed that there is a way to help me out that I don't know about...anybody got some enlightenment on this?

Note: My lag usually isn't that bad, I'm always in the green - will these be worthwhile?