My previous strat + Zergling's strat. I'm not sure if this could be improved, maybe with some mirco-managing and some luck could lower the time but this is a hard route to pull off. One thing I'll like to note is that the reason why the stats didn't count the headshot at the end because the general when sitting has a broken hitbox.

Also this is a NG+ Strat simply because you cannot get the 9mm SD in the loadout until after this mission. (You start with 9mm SD in normal difficultly though.)