Erm for this a little more info would be handy IE what type of healer are you sorc or nature and your spec within those trees
what i can say about weapons is ranged weps are always the better choice if you look at the healer we have atm Zanven uses dual pistols The Divine uses hand blasters im currently using a bow all of these weps have a rapid fore ability that allows the hit counter to get high fast with minimal danger to your character for pure speed i personally think the hand blasters are the better choice with pulse beam.
If your really stuck hit people ingame for info
The Divine and Zanven are good for nature info im good for sorc both sides of the tree and im sure theres more but im tired and my brains not working lol
heres some starter info for you Sorc Destiny healing