Gothmog pulled forth the millennia of supralife* existence that he possessed to think of something clever, cunning and wise. Wise like a mage! Cunning like a fox! Clever like a ... clever thing.
Aha!
The hordes of skeletons advanced. Their menacing weapons (carrying risk of tetanus and slow blunt death) were brandished high. Their grinning faces seemed more grin-y. It was like an army of Death advancing on thr worried party.
Gothmog drew himself up and pointed a taloned hand. "Look over there!"
The skeletons stopped. Five of their number turned around in confusion. The rest of the skeletons, despite lack of facial features, gave Gothmog the same incredulous look as the party.
"What?" asked Gothmog to the glaring party. Gothmog's eyes then went wide, and he pointed a taloned hand. "Oh my god, look at that!" The party whipped around in fear, and Gothmog legged it while they were distracted.
The skeletons watched Gothmog depart, shrugged, then carried on their menacing march towards the party. Well, except for the skeletons still looking over their shoulder to see what Gothmog was pointing at originally.
Go back to 126 and fight the skeletons. Note you have temporarily lost Gothmog until the fight is over, but at least you also have 5 less skeletons to deal with too.
*Wow, if you are playing this straight and not just reading all the chapters, and actually were forced to read this section, well, boy will you be confused by that sentence, but you know - you deserve to be! Read sections 127 and 128 like normal people would!