I'm encountering a problem where upon entering Level 2 of Vyrax's tower, my game crashes.
I've tried with both the Ranger class and the Engineer class, and I can confirm this is only with Synergies: Everything works fine on vanilla Torchlight 2.
My pets were the Leopard and the Cat.
Both of these instances were the exact same. I encountered no problems throughout the entire game, until I cleared Level 1 of Vyrax's tower. As soon as I click on the entrance to Level 2, my game crashes so quickly I don't even get a loading screen.
Also, in both instances I was using a melee weapon, if that's relevant.