Awesome work with the boxing in a raid. And keep it up with the front page posts. I know I enjoyed it when I was featured there :P

Anyway, grobulus I can see the strat with would be fairly simple but thadius would be a bit harder (unless you just spread out to avoid the charge swapping). I was thinking that if you had your shammies side on to Thadius you could strafe them if they needed to swap sides. I'd probably set up t/y for left/right on main, u/i for 2nd char, g/h for 3rd and j/k for 4th. Then if you have a mod like xperl you can ramp up the size of the debuffs so you can easily see which char needs to strafe. Red means left, blue means right. Would take a bit of a toll on the memory but I reckon it could be done. You do get a fair bit of time to move to each side and being ranged you can afford to hold down the keey a bit longer while you work out what other chars need to move.

The same could also be done for Heigan. Turn towards the platform and just strafe the whole fight. Phase 1 you can dps a fair bit and phase 2 just worry about avoiding the lava. /follow doesn't need to be used. Just have you tank tank him in front of you.