in reply to your "should i set up macros" question the answer is yes. time spent learning it thoroughly now and setting up properly is the key to making it work properly. yes you can use 1 as a healer alt but would that be any use of a third account? or would you rather use the third as a dpser with the option to heal as well as the other 3 and that way power through quests faster than before.

also a tip, if your going to add a third account use RAF from your second account not your first. (you could then give levels to 2 accounts not from 2 accounts to the 1 account ect).