I rarely play any kind of support or healer in games. But few times I did and had a good time doing it was in Anarchy Online while I was playing as the Adventurer and Metaphysicist classes.
As an Adventurer I had a lot of auras that could buff attack, defenses, movement speed, and even healing. Because of this even if I was not actively healing people I could just passively heal them with one of my AOE healing DOT auras. As long as my aura was active I and people around me would get a small heal every few seconds. So I didn't have to think about healing myself or other people while in a fight, because as long as people knew to stay within the range of my aura they would keep being healed over time. On top of any other aura buffs I had going at the time too because they staked. So in large battles Adventurers was both damage dealers and backup supporters because of their auras, as people would naturally gather around them while on front lines.
As the Metaphysicist was a pet class that could also use AOE attacks, it was not uncommon for players to send their pets into battle while stay back to charge up one of their AOEs that toke a long time to cast. Metaphysicist has one pet for attacking, one for defense (projecting energy shields), one for debuffs (often slowing or rooting enemies), and one pet for healing. If I just summoned my healing pet it would only follow me around and only heal me. But I could also tell my pet to follow other people around and heal them even if they was not in my team. It was not uncommon for me to just tell my pet to follow around the tank in the group while I stand back far away casting massive AOEs that toke like 30+ seconds to cast.
Because if my personality type (I'm a yang fire type) even if I pick a support class in games I tend not be good at them. Not because I don't want to help people, but because it is against my nature so the order of my thoughts healing and buffing near the bottom of the list. And that is why the few times in games where I was able to play support and/or healer well are in games when I can passively heal people or set up a kind of automatic heal for people (like telling a pet to heal people for me or setting up an self heal station while in battle). So unless there are going be skills and abilities for passive healing in Em-8er I don't think anyone should look to me for support, unless they need something to die faster because I'm pure glass cannon ready to blast holes into mountains and making a crater on the moon that was in the horizon.