3-Box Comp: Pal, Dru, Sha

[Zintask]

ISBoxer and Jamba for the mod
The current issue that I'm trying to resolve is having my Resto druid as slave.
Without using macros or repeater regions combined with mods (basically just opening the game and playing) I am having a problem where my resto slave is like 1 step behind on the keybinds. I target my paladin, then press the rejuvenation keybind and it heals itself. Then I press the keybind again and it will heal the paladin. I would assume this is a common problem?
I tried using the setup from http://www.dual-boxing.com/threads/46370-GUIDE-Click-Healing-System-Using-Party-Frames?highlight=healer
I'm fairly certain that I am damn'd close to getting everything right to make that work but I'm wondering if there's an easier way.. Like a repeater region guide for grid or something? Even a crash course in repeater regions would work wonders i think.