I switch out my mastery depending on the fight, but the combat advantage group buff is nice for Steal Time. The speed buff is also great for some kiting fights. When I roll with my premade, I tend to roll with it in master, Ray of Enfeeblement, Entangling Force, and Shield.
Thank for reminding me what encounters I'm supposed to roll with :) That being said, the 4 piece set bonus STILL doesn't work with Steal Time (or RoE for that matter). I tried every control power I have, and it only procs off of Chill Strike and Entangling Force. There are a couple of the crappy ice encounters that I…
I'm switching to Magelord from High Vizier. The 4 piece set bonus on High Vizier is current gimped in my opinion. The only "control" abilities that I could get to set it off are Chill Strike and Entangling Force. Tabbed Chill Strike, however, seems to stack the effect on multiple mobs. Even so, I'd prefer the higher uptime…
Don't forget about the Magelord set. Personally, I have the High Vizier's set, but I like the stats on Magelord best (prefer Recovery > Power > Crit > Defense). It's hard to say without testing, but I would prefer the Shadow Weaver's 4 piece set bonus.