Myself I use keybinds to heal (4x target chain heal on shammies + healing wave on the tank). This has been more than enough for me throughout my Wotlk HC dungeons journey. Have plenty of keys to do that as I'm using the G11 & G13 keyboards. Since I also (single) tank on my pally in icc, I use the same setup for boxing as for raiding: clique + grid and it basically looks like:

right click = righteous defense,
alt + right click = hand of salvation (to reduce threat)
alt + left click = hand of protection (prevent physical dmg on a player)
ctrl + right click = divine intervention (ie. bubble a player), i use a different modifier to prevent casting it by accident

I can imagine to have both tank & healing options setup with clique might get confusing. Maybe both running healbot & grid is an option here (e.g. use healbot for tanking & grid for healing)? That being said i don't use any commercial boxing software so i'm somewhat limited to know what's possible with the repeater regions.