Multiple Focus Targeting

Multiple Focus Targeting:
It would be nice to have multiple "focus targets" as a feature.
In my case:
- When playing as a Healer. I'd like the ability to put 1 focus target on the Tank for watching their health, buffs, debuffs, CD's and using rescue.
While placing another FT on the Boss to watch the cast times of tank busters, and roomwide AoE's.
- As a DPS, 1 FT on the Healer to watch the health as an indicator of stolen aggro/enmity or when adds spawn off screen and I'm not looking at party members being attacked. To react faster.
And a 2nd FT on the boss for the same reasons as before.
- In raids, 1 on the tank, 1 on the 2nd healer and 1 on the boss for reasons you can probably figure out by now.

Currently using 'target of my target' and the 'party list' results in a limit on what I can see cast wise and often misclicking in emergencies on the wrong person in the party list. Have to rely on prediction and anticipation to a degree.

It's more for Convenience rather then anything.