I find Fuii-Boxing perfect, had no issues using it, I just adjusted the layout a little to my needs which you can easily do with the script.

A few tips:

- Order team list by name
- Use BT4 (or any other equivalent addon) to create HUGE buttons for heal / shield / buff / decurse etc. next to each member using macros to target party members (so the bars are always located next to the party member) for easy clicking
- Use EMAC auto intive / follow / unfollow keybinds
- Leatrix plus for extras