I've made some summary sheets for the all Descent monsters for Rtl including all expansions. Sheets are sorted by beasts, eldritch and humanoids for all campaign levels. You can find them on BGG:

http://www.boardgamegeek.com/filepage/43750

They contain a small "statistical" plot with the probablility of an successful attack in dependence of range (x-axis) and damage (y-axis). Probablities were calculated without the X, as this is always a miss - black 100%, blue >90%, green >66%, yellow >33%, orange >10% and red <10%. There's also an german and spanish version.

If you come across any mistakes I'd be glad to hear!