Consider power base supply of reactors in construction when predicting power states.
Make G_(Reactor|Overmind) also return unpowered and dieing structures. Add G_(Alive|Active)(Reactor|Overmind) which consider the respective conditions.
Display kill assists by players & bots.

Kill assists are whoever (other than the killer) did most damage.
In the case of a tie, the most recent is used.

(Currently, this code re-uses groundEntityNum via a macro for the assistant.)
Require reported assists to be for ≥ min(killer damage, 25%).