I'm wondering how the riot grenade is best used. I figuered I can moderate the damage by proximity to the explosion to avoid a kill and get a stun, but no such luck. I tested it on an academy engineer, and she is either killed or remained standing. A stun is very rare. Also, the tu damage doesn't seem to do anything, she always had full tu on her turn (nine shots out of a laspistol + two tiles move).
Do I need to pick more beefy targets like raiders and ninjas? Is the tu damage good for anything at all? Does tu damage on timed explosives even work? (explosion at end of turn, tu get refilled right after at start of turn)