IWM is probably your best way to interact with doodads (especially if you have click to move turned on).

Why do you need to separate your tank and dps rotations? Generally you push one button and it does the single target rotations for all toons, and another button that does the aoe rotations for all toons.

I personally use grid and just add a buff icon to the buff I'm tracking, but you probably also want to consider a lazy rotation option that might be lower dps but easier to handle (assuming you'll have gotten a proc for whatever every 15 seconds and trying to cast it then).