Go back to the seeker camp first and buy stuffs from Gareth. He sells ridiculous gear that can be used to make fight way easier.
The most dangerous thing to look out for really is the Chain Lightning and Pain Shackle used by the void woken. You need to be able to take out the mage ASAP. You can teleport the archer to somewhere away from the fight and there's a chance it will bug out and just run around randomly before ending its turn every time.
But if there's no choice, reloading is an option. It really depends on your build because a good Dual knife + Archer build can easily kill the mage before it even acts.
