Appreciate the corrections about the undead stats, I did the same thing for the abomination and have no idea how. Too excited to get to the finish line maybe! I'll definitely update those.
Thanks for the detailed review.
It shouls say this somewhere in the info sheet but isnt e plained in depth -- the Calc is giving you the *hardest* possible version of a room, which may be giving you a sense of inaccurate measurements for skirmishes, especially when you add a weak monster and see the number jump really high. To see how this works - and to see exactly why the monsters are sorted - think of your heroes killing the weakest monster in a room full of enemies before their turn ends. The calculator isn't just using the attributes of the monsters but also taking a subjective application of turns into account, and so the strong monsters swamp your heroes. The idea is that any calculation that is able to realistically take into account a room full of monsters should actually give you a range or window rather than a hard number. The hard number that is given here is the "what's the worst case scenario" which to me was better than the alternatives (being "what's the lowest bar of entry for this room but only if you are very lucky?" Or "what's a random number in that window I can give you that won't make sense once you account for the difficulty ceiling with a completely different group of enemies that is much harder but returning the same number?") So that's why I developed this compounding method.
To the point about additive formulas, I historically don't like them, but I realize simple formulas for base game monsters can be much simpler and more eloquent since there are only eight monsters. This sheet is for (not to repeat the info section) adding in more complex entities and for homebrewers, and thus make the stats more weighted for situations where you might have a monster that has 1bp, 1ad, but 6dd, or another with 6ad, 1dd and 1bp. These would have the same danger if their stats are added together, but obviously have very different presences in a room, and the calculator deliberately reflects that.
I think 1 abomination versus eight separate goblins would be a fun playthrough with a pretty close end. I might play this out and see how it runs. :)