I call BS on this made up assumption that Scoundrels are meant to be a "HoT" class when my single target heals and surgical probe + purge are the bulk of my heals that get me to 250k+ heals every warzone. I don't see how you can see yourself as being so gimped. Screw kolto cloud its a waste of energy, that means DONT waste a point in it. I use emergancy medpac, as a way to help build up my upperhands to use my surgical probe more often. I immediantly spam surgical probe as my underworld medicine is casting, so Its a instant 1500-2300 heal on to my underworld medicine that seems to crit like every other heal for 3800-4200 then throw a purge for additional 200+700-200+1000 heal. I don't seem to have the "problems" with running low on energy either. I am constantly in combat at around 50% energy but normally I can build back up to 90% at most points during the fights.
I place myself tactically with steath, and if I get a train on me, throw purge once and vanish, and move to a safe place to continue healing. Our interupt is our best friend, and I feel like many of us overlook it as well.
Lastly Sorcs never seem to heal for as much as me, my damage is very low however, because damaging is a waste of energy for healing scoundrel.
Best thing is that we don't look like healers, and our heal animation doenst really give us away so its easy to get away with chilling unsuspect while I am just spamming heals.