Well the Doctor is using my old gear every time I upgrade, so he heals for a lot. Most of the time, I can't back stab unless I stun them. Acid blade, things melt quick. Operative is truly a late game class, people weren't kidding. The higher you get, the stronger you are in melee. I haven't had any troubles with elites but I also have biochem so my consumables also heals my companion (Pro tip - it can battle rez your companion).