OK. Check out my fan fic for how these battles played out with Tabletop using higher levels for all these characters. Just haven't gotten to the Minthara fight yet, but everything else is written up.

Chapter 16 - Nature's Fury is the fight between Kagha, Rath, Olodan, etc.

Chapter 19 - Battle of Wits is the fight against Priestess Gut

Chapter 20 - Absolute Betrayal is the fight against Ragzlin

https://forums.larian.com/ubbthreads.php?ubb=showflat&Number=786554&#Post786554