As a lvl 50 operative healer, I must say I am still learning how to play this class. I heal with great efficiency, but I know I can be much better. Here are my tips: Keep your energy above 75% at all times. Use Kolto Injection on players you think will not die during the casting time (depends on situation) Follow up with surgical probe immediately after injection. Make sure you have kolto probes on as many players as possible, but watch your energy. Always try to have 2 tactical advantages at hand. Use toxin scan, especially in hutball, to remove negative effects and heal. Do not be afraid to leave combat for few seconds and heal your self up, dead healer is useless to those still alive Try to stack critical rating and surge on your equipement, you will crit more, especilly with skills in your skill tree, and your criticals will be stronger. At lvl 50, I easily crit for 3500-5500 on kolto injection. I guess thats it, I wish the UI was better, since we have to watch the helath of others, our health, energy and tactical advantages at the same time, but it is managable.