As a LONG time D&D player, I knew right away that Lae'zel was at best a naive newbie or at worst a liar. The Githyanki are a chaotic evil race who's leaders made a pact with TIAMAT to have red dragons to ride. When she said her people could help, I immediately knew it was going to be a lot of fighting, and I believe that when she says "purification" she thinks it means a cure, when it's more likely to be a fire or a blade. I thought that encounter was spot on. super arrogant leader who's insulting and immediately leaves when the fight is about to start. BTW, my dialogue choices did not lead to a fight, (after save scumming because they kicked my ass every time). Not sure if that's the best option though.