Maybe mistweaver just isn't the healing class for me because I just can't get anywhere in endless on this guy.
I watched the video from the guide on wowhead and that druids mana didn't seem to move in waves 20-30, yet I can't seem to get past wave 2-3 without blowing through my mana. I know it's definitely something I'm doing wrong, but I think I just find the mistweaver monk a bit annoying for these.
I have a druid at level 87 and I can't wait to get him to 90 and get a bit of gear to see how I do with him.
You get quite a few free and efficient heals with mistweavers, i'm not sure why you are having problems. Are you not kicking or stunning the caster adds in the first few phases?
I ask that because if you interrupt once, it literally trivializes like the first five.