H.Garrosh aff just isn't as well suited to beyond boss damage or if you run a kite strat a glyph'd coex to help your kite tank. Breaking MC's without using dots is problematic though your weapon damage is usually pretty good and KJC makes for easy peasy mobility. Flip side is that destro w' havoc isn't far behind on weapon damage, burst aoe's/breaks MC's infinitely better, and can usually beat aff's boss damage if you use havoc intelligently w' shadowburn. You also have ember tap for panic moments. Siegecrafter is another one where managing mines, esp F&B aoe on the move, is extremely helpful.