Oh!
thanks, I've been finding that my Glaahks haven't been half as effective at stunning as they were in the beginning so I didn't even think about them. he was doing three, four hundred damage a hit to my rots...
try this strategy I shall, thanks!
edit: well, now he's being 'healed by the sun' more quickly than I can damage him..
second edit: when I added two shock-tralls to the mix everything worked out, thanks