PvP healing & dpsing

Hi all just curious as to how you manage it yourself. As it stands I am running a Priest/4 mage team and am shortly going to reconfigure all my macros/key bindings etc. As a priest I like to make full use of all my healing spells in PvP. Shield/ProM/Flash Heal/Gheal/renew etc. The problem I have is that when I click on someone to heal them my mages won't be able to attack as they are /assistfocusing. I assume the only real way to get around this would be to use /mouseover healing? The other problem I have is when I press 4 for example I will cast heal on someone but my mages will also cast fireball. I guess the only way to get around this would be to setup my healing spells on different keys? I've already used up 4/5ths of my keyboard :P Anyway any ideas/comments/setups you use yourself are greatly appreciated.

If you are driving from the priest then I would definitely go with a "click" healing mod with your most common heal on the left click, shield right click and all your other heals on modifiers.

For instance:
left click - flash heal
ctrl+left click - greater heal
right click - shield
ctrl+right click - dispel
middle click - HoT
ctrl+middle click - group heal

I used to have a click heal mod quite a while back. Don't spose you know of any that actually heal when clicked but don't switch targets?

I'd take a look into healbot for that. Although I'm not entirely sure how many combinations you can do with it.