i do not suggest running purifying light. sometimes it's better just to keep ur sefl in a position to keep on sweepsing instead of purifying light. you already have three skills you need to try and keep up on ur enemy, vamps bane, entropy, ele drain. purifying light adds to this combination of skills and mean you'll not have much time to damage a target, it also encourages you to stick to one target and "overcommit" to a target just you can get that phat "pop" from light...which never is very big anyway...also. I'm 90% sure they fixed the "stored from previous cast" with purifying light. I can only get mine to pop for 5k in most fights...if that, which is crap when one cast of sweeps will get me more than that by about 25%
my CP, eh...you really should run through your own tests to figure out the best CP setup for you. I block a lot, dodge a lot and sprint a lot, so I have more CP into those in green trees, I also don't heavy attack often so I don't have any points into heavy attack resource return. blue tree is Very balanced, all CP are brought to be on par power per point wise. my red tree is the same, very balanced.
I run 25.5k max health, and 3k crit resist. after gear you really want to squeeze everything you can out of damage.