First idea:
Since we can’t control all heroes:
Aggressive stance:
Do not hide behind cover. Do not use healing and other useless defensive features.
Reload and shoot! Reload and shoot!
(Good when heroes have overpowering stats in bounties, raids, etc. to do maximum damage)
Defensive stance:
Hide behind cover, heal.
Good for pvp when you want to save certain heroes (healers and revivers) for until you do your thing with the hero being under control.
Second idea:
I personally very rarely use this feature when you can choose rear-middle-frontline heroes for bounties.
What I would use is mech-bio-energy selection.