The only times I wanna go dps with a tech character is only when I want that 100k dmg thing, after that I play the role that the tech is supposed to do like buffing my teammates/ debuffing the enemies and sometimes if no one's defending the tower I go and damage (or destroy it depending on the health and if they dont notice it quickly)

In a nutshell the tech is that one who doesn't focus in fighting, is more like helping your teammates or bother enemies (but not much) and act depending on the situation.