I dualed my holy priest/boomer from 70. I think you are wasting 1 and 2 keys in earlier levels it doesnt matter but once you get more spells you want all the keys you can get. i personally have my follow macro bound to [ key for all my combo's. \ is to drink/eat and ] is for buffs, but that is all down to personal preferance. I used /assist /cast macros as it was my first multiboxing attemt so now i would change that to focus based ones. moonfire/sw pain, insect swarm/devouring plague, smite/wrath and holy fire/starfie was the bread and butter spells i usually used, there were a few issues with timings of smite and wrath being out and to get them aligned means gimping your dps a bit unless you keep button mashing, i found there were quite a few times the priest was just standing there. This is all off the top of my head as i haven't played them for a while and im at work. i had my druid as main and priest as follower. I would spec the priest holy or disc and for ease go balance with druid, feral/caster is a little harder to do than 2 caster so i would keep it simple to start with GL, i had great fun with my priest/druid.