Sheild is very mana draining = less up time. Just start your rotation and about the time they get to you fear them. They should be dead by the time they get back to you. Use a macro that checks if you are casting mindflay before casting it again so you can just spam it.
What level you are will really effect your rotation, but for the mid levels I'd go with:
MB, SW:P, VE, MF, MF, MB
once lvl 50:
VT, VE, SW:P, MB, MF, MF, MB
While it is a bad talent for groups and raid, imp VE is good for soloing. I like blackout and I had sprit tap, but in hindsight I think EB was right - you just don't have enough sprit to justify it. I'l go with blackout >spirit tap if I was to do it over again.
I personally don't grab silence for PVE. I prefer casters vs caster and don't want them running up to start punching me in the face. I do get improved PS(fear). Get martydom (spelling?) ind disc. and you won't have to worry about pushback near as much.