(I'll come back and update this comment with my thoughts on the other realms in this collection as I play them.)
Dread Manse: I dig this concept of a meat grindery combat-centric mini realm. Personally, after I fully explored all the Points and died a few times, I found the temptation to rush straight to the boss was too strong to risk losing precious Health for the optional stuff, but lucky for me it paid off! (Edit: I missed the mechanic which allows you to heal, funnily enough.) Probably works nicely as a test chamber for builds, too.