Oh, so she HAS gone full insane.
Also. So they DID have a very limited amount of shells. And they spent 3 or 4 of them, shooting at a 4 person infantry group.
Y'know, the fact that she has gone insane explains a lot about her decision making.
Like, seriously, guy is crippled near the tank and SHE WANTS TO ASK FOR ANOTHER SHELL SHOT?!?! Literally takes the subordinate going "Just fuckin' spray him with the machine gun" for her to consider using bullet spray against the small soft targets.
All that said, I think this was the most drawn out and painful death so far. Hands blown off. Nice bit of concussive blast about 1 meter away. Bonus shrapnel that didn't seem to hit anything vital or major. And to top it all off, I can only assume Subahan was trying to tell her something about unecessary usage of explosives against soft targets, because holy shit was that unecessary.
That tank was probably somewhat salvageable up until that point.