That’s kind of the rule of thumb for healer ultimates. Main healers get temp ults, off healers get defensive ults. Valk, window, coalescence, and nano aren’t very explosive on their own, but provide a significant advantage to their team if used at the start of a team fight in such a way that benefits their team. Like super charger. I really don’t understand why Brig has a temp ult tho, it doesn’t fit.
In bunker? I don’t think so…