Cleared Sins of the Father!
http://prntscr.com/l88rdoNotes below:
@Avatar - as soon as you mentioned Stheno I figured I'd try this, since that is by far the easiest way to play through Hexx Ruins.
This challenge is a lot of fun! Leveling is very challenging here, even with EM helping. The bosses aren't that difficult, especially when compared to Stoneless. If I were to change anything, it would be to maybe give the Sacrifice magic resists as well, and also a few more DPs - maybe 5 would be good. And the Vessel should really have more than 1000-odd health. At the very least I think he should start spawning goats right away instead of at a certain threshold - this IS Curious, after all, and it would make him a little bit more challenging. But mainly, more health and more damage than a measly 75 would help a lot with that.
By the way, I've always wondered - why is the Vessel hardcoded to teleport around instead of just giving him Blink? I'm actually not a fan of that, since it just cuts down on the number of strategies you can use on him.