I have 3 things about the Sindragosa fight.
First one, the best one:
Use a druid tank, he can shapeshift to drop the frost breath debuff. Use a macro to powershift when tanking p3.
Second and third, rogue only:
Cloak of shadows on the stacking melee debuff.
I found that using it on 6 stacks let me drop it again at a good spot again when I got pulled and had to run out.
Vanish on mystic buffet.
Watch your debuff, vanish right at 2 secs, that lets you reset that stack.