OP,
I wouldnt throw the towel in about healing. carry a healing set of of weapons for your ele, and switch when you want to heal ppl when there are alot of other mobs killing stuff but they could use the hp suppor.
If there are not alot of toons slaying things wipe out the staff and Bam toasted mobs. Its tough to find the right balance.
As a guardian i always carry a staff and throw out some hp and help out my buddies. Good luck with th ebalance though. Dont get stuck in one or the other cause just like yoda said, " you must unlearn what you have learned". HAHA sorry couldnt help it.