First time poster here...

I've been multiboxing WoW for several months now, and I absolutely love it. I won't go into my whole history of teams, but after some experimenting and a fair bit of success I decided I wanted to bite off a true trinity team - tank, healer + 3dps.

Here's what I've done to try to get it manageable, and I welcome any critique or suggestions. (Technical background, I'm using isboxer in "pro" mode and GSE to help with most dps rotations)

1 - Party frames are near the middle of the screen. They have 2 clickbars over them for 4 different clickable heals (left-click, right-click on each of the 2 bars)
2 - Healer's tacit "dps" rotation is to spread heals across the whole team
3 - Have as many "oh shit" buttons as I can keep in my brain hot-keyed (self-heals, self-damage reductions, blessing of protection)
4 - All melee dps to simplify movement - all just follow the tank as I need to move out of ground-poop

My question is actually pretty general, and not team-specific. Those of you who are also running a trinity team, how do you keep up with the cognitive load of dealing with movement, healing and maintaining reasonable dps? It's not going so well for me so far.