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Templar as a healer works. Anything else... Templar has always been one of the hardest classes to play with. Even more so now since they got hit with the nerfbat.
There are lots of guides for gear/skills and playstyle as a templar healer. Google them . Think before you begin though. You could consider rerolling another class. Even if they fix templars broken skills and up the dps a bit it will always be (one of) the hardest classes to play with.