There are a lot of fights, IMO, in Act 1 that if you go in blind are very tough. This is one of them mostly because it's easy to stumble into at L2/3. This fight absolutely gets easier as you master the game's mechanics and streamline your approach to Act 1 content.
I very much enjoy yeeting this boss into the phantom zone with the knock back version of Eldritch Blast. I toss a fire bomb onto some eggs with everyone hidden, she comes to investigate and is going to be close to the edge of something just by the nature of the landscape. Just need to land 1 EB and she is gonna get knocked for a bunch of prone damage or killed outright by going into the chasm. If you don't have a Warlock (which you should, at least in camp) you can get the same mechanic working for you by attacking the web bridges while enemies are standing on them that only have 4 HP even on Tactician. You miss a shitty green +poison robe this way, who cares.
All that said, you can largely control when you do the toughest fights and you can save this until you are level 5+ at which point you should be able to just face tank this encounter and it will be easy. I think I was level 4 when I did it the most recent time.
You can get to L7 by the end of Act 1 if you do literally everything. None of the tough fights are tough there at L7 and every one of them is very doable at L5.
