Support is a tricky word. In a team everyone is responsible for something, usually divided into what they excel at. However, everyone can typically perform any other teammates job to a lesser extent but good enough to do it when needed. With the exception of being able to heal others.

With that said regardless of how little or much damage any build engineer brings to the group is another dimension of the support he or she can offer. The goal is to kill stuff and stay alive. Any effort to increase the speed in which that happens, regardless of primary role is supporting the overall goal.

I use the Incinerator because my stats with a 50 armor implant and my buff brings me to 662 armor 411hp and 437 mana. I could increase these numbers by switching to custom, but with the potential for new content soon I don't see the point of wasting the money. I can still dish out some damage to assist in the goal while managing to keep everyone, including myself alive.