Global Recharge bonuses are the go here.
Empathy has great buffs with long recharges, the faster you can get Fortitude, Adrenalin Boost and the two Auras up again the better support you can provide.
Accuracy bonuses, Recovery and personal Defence arent going to do much if you don't attack, which is your choice if you should choose to do so. I feel the need to point out you'd be a better Defender with some attacks, if you know this already and are not choosing attacks for concept reason, then good luck to you playing how you want to. 
Have a look here:
http://paragonwiki.com/wiki/Category...prove_Recharge
Doctored Wounds (5 pieces) in any healing power gives you +5% recharge, so stick that in Healing Aura, Heal other, Absorb Pain, Regen Aura and wherever else it can go.
Red Fortune goes into Manouvers and Fortitude for +5% but be aware you can only get 5 bonuses of each type, eg the sixth +5% Recharge will do nothing.
Even if you choose to go down the path of never attacking for concept reasons, it may be worth picking up some powers from your secondary for use as "set mules". eg if you have Dark Blast, any power can take four pieces of Cloud Senses for the +6.25% Recharge bonus to make your Empathy buffs come up faster.
The best way to get hold of these enhancements is to buy the recipes and ingredients through the market at Wentworths.
Hello There,
Let me first that that I have been playing this game on and off for a long time, mostly to have some fun, so nothing more than just grouping and missions, etc..
AE system and also auction is all new to me, also the word IO is pretty confusing to me, I do understand after reading many post on the board that they are enhancements lvl 50+ that are better than SO.
My question is quite simple,
I have a defender lvl 50
Empathy
Flight
Teleportation
Fitness
Leadership
Power Mastery
I have no attacking powers at all.
What set would you go for, if you idea is to buff and heal?
Where can you find it ? or is it possible to buy it from another player and for how much ?
if you need more informations to be able to give me an answer let me know
Thank You !
Tiffania