Luna is up for disc healing .. im trying to help but know next to nothing on the subject at the mo
Tips welcome as all i know so far.............. they are a boss target mitigation machine while playing whack a mole with bubbles
Depends on the fight tbh as to how they heal. First issue though is that disc & holy gear differs. So a holy priest is not ideally geared for the disc role and vice versa.
Disc tends to be useful where the boss damage is large & spiky.
Disc is hopeless at light AOE damage.
Disc is excellent for absorption/mitigation healing with the bubble (like Anub or Patchwerk).
I'd suggest Luna reads up on the spec first to see if he would like it. It is a distinctly different style of healing and he might not like it.