As a sawbones here are the medals I regularly get
2500 heal
75k healing
5000 heal (about a third of matches)
2500 hit (I stealth and pop out on low level softies for this one)
1v1
1k defender
3k defender
killing blow
75k damage (about half the time, rarely in Huttball, but a lot on civil war)
Highest healing in one WZ for me was 260k probably
I start off stealth, open up with the opening shot, follow up with pistol whip then shotgun then slow, then start healing. I usually throw up a bunch of Emergency Med Packs on people, every now and then a kolto cloud on a group. A lot of times I'll have 75k healing on myself in one life because they'll try to focus me, and with my HoTs, personal shield (why doesnt that count as shielding for more medals). And then healing through the damage it probably takes 3 or 4 other people to kill me easily (mixed levels of course).
But on average, I would say I get 4-6 medals a wz, in comparison with tanks who get 7-10 on average.