The only problem I had with this fight was that the Young Mephits were bugged to not move or take action so I'd be waiting a minute or so in-between turns. I'm sure there's multiple ways of approaching this fight but I buffed Lae'Zel with Jump which broke stealth and initiated the fight. She had a surprise round so I jumped her in about twenty meters on top of one of the Ancient Mephits triggering them to attack her instead of endlessly spawning the young ones.
