You can free Halsin without triggering "kill the interlopers!" rally of the Absolutists.
You can arrange a tete-a-tete with Gut in a side room, lean in, look deep into her eye, lean in further, your foreheads almost touching, and kill her discretely then.
Befriend spiders and coordinate attack on Ragzlin with them. Easier said than done, though, as the spiders operate at their own speed.
