Perfect Pitch Mule Training (Cleric)

Well I made 66, met my first dc hacker and a lot of ksers. Either way I'd still like to get this question anwsered: When does Shining Ray start to outdamage heal on holy weak, neutral and holy resistant? And what would be reccomended as a training spot after mp3 untill about 75 or so? Probably solo since trying to find a party sucks in demethos. If I go solo only would it be a good idea to Max shining ray first, since I only care about getting to lvl 85 as fast as possible for the wild wolf bandana? Last but not least, does shining ray's damage spread out like heals damage does?