ok first off let me say that im a 67/62 druid scout.
ok as for the question if wisdom adds to your healing, the answer is yes it does. the best way for you to observe this is to check your hots before/after adding concentration prayer. however if yor skill level is too low or you dont have apx 2k wis you wont see much difference
also look for gear with healing power bonus on it. this is a straight bonus to your heals. so if it says 1200 hpb then it will add 1200 to your heals.
wisdom is only one part of the healing formula. i suggest reading this article done by remilafo as it will give you a good insight as to what you want to stat for your d/s.
http://forum.us.runesofmagic.com/showthread.php?t=50481
now as for gear, i currently use:
tribute full set
shadoj set minust earings
savage light cape
flame dragon intel set for accessories
t9+12 heart of nature staff.
this imho is the best gear up to the new instances for a d/s. many ppl argue that you would do better with a kawak gown and such but the set bonus from the tribute set is pretty nice.
to maximize your heals you want:
healing power bonus
high magic damage
high wisdom
max you passive skills(pure healing, the wisdom one in your general skills)
get magic damage food (better then the 5%healing bonus from heal food when i tested it)
lvl a water element holy pet egg
either healing potion of spell casting speed potions. (i use spell casting speed)
and then its just good old practice makes perfect.
my gear is almost completly crimson stated save for my wings and my strikers, so im on the very high end of the game as far as druids are concerned.
on a side note. camillia flower blossom life and healing arrows, as well as the recover regen all work mainly on hpb and magic damage. wisdom is a component, but its effects seem smaller becasue the heal is divided over X number of ticks. but again read up on the healing section of the article i posted earlier in this post.
any questions feel free to pm me