Nice update! Some suggestions:
- Add an achievement for successfully killing Immortals
- Aegis's Glyphon counts shouldn't be stackable with Enhancer. A dozen of Glyphons just makes game laggy
- Pandora may get some buff? Her first skill is quite weak and her third skill's healing ability is just not useful anymore in mid-late game
- Add an arena-specific artifact that allows one to revive fallen teammate
- Main menu music can be a bit louder
- More enemies spawned for multiplayer at 200% difficulty