Muraki
2
If I am not mistaken Siptah was meant to be a little more difficult for faster progression so you have the ability to get good stuff in general early on, its also a smaller map so map rooms are really not needed and as far as the Grey Ones are concerned, they are glass canons and die fast, let your thrall tank for a few seconds and you can chop them down, just make sure you are of decent level and equipment before you get there.