Hi Noni,

I want to ask if you have tried to use a healing macro? The one I currently use on my WHM is:
/macroicon "Cure"
/ac "Cure" <mo>
/ac "Cure" <t>
/ac "Cure" <me>

What this does is when my mouse is either highlighted on the target's health bar on the party menu or on their actual character and begin casting Cure, it will cast Cure on that target. If my mouse over target cannot be casted on (such as currently moused over a mob) then it will heal my target instead and if I am targeting a mob and not moused over anyone then it will heal me. It takes some time to get use to but I macro Cure, Cure II, Stoneskin, and Regen to this and it helped a lot.

This is helpful because I do not need to click/press F1-5 to cycle to my target and heal while my focus is being taken off my character to avoid red circles. Also another advice is that if the tank is still above 60% and a red circle pops on me I tend to walk off and disregard my cast and then use a Cure II to make up for it.