[MothEnthusiast]

I think instead of an auto-desummon, just give bots / youkai / etc a status upon summoner defeat. 'Summon Decay' or something, with a duration of 2 rounds. If the summoner isn't back up by the end of those 2 rounds, the summons poof. Gives time for hail mary's, revives in team fights, etc without completely shafting people in events if they get unlucky. Also gives some dispel play potentially as well, from allies.