I started leveling bodyguard spec from level 10 so I can't compare dps vs healing for leveling. I used Gault as soon as I could then switched to Torian because I think he is cool. At no point in my leveling did it feel slow or that I lacked any dps. I didn't really use any rotation, but I used death from above any time I could and I would cc lesser mobs with explosive dart and rail shot them.