New version of my spreadsheet is finally done. Calculates the average number of attacks to kill a given target with a given attack, and also the damage spread for a single attack. It has all the monsters and weapons from JitD, WoD, AoD, and ToI pre-entered, but you can use the built-in macro to do all the same calculations for stats you enter yourself. Supports just about everything you could want--power dice (including silver/gold), surge abilities, bleed, burn, bash, stealth, multi-target attacks, range, fear, etc., etc. There's a big list in the spreadsheet.
So you could use this to figure out your odds of hitting from 5 spaces away, or how much a power potion will improve your odds of a kill, or what your chances are of rolling the 3 surges you need for a special effect, or which is the best hero to prey upon, or the optimal number of bash dice to use. Admittedly a little esoteric, but it certainly has its uses as a player-aid.
Where it really shines, though, is if you want to create your own content. You can create crazy new weapons or monsters, enter them into the spreadsheet, and see how they stack up against standard content or against each other.
For the record, the weird abilities in the spreadsheet you've never heard of are included because I'm using them in my in-development Descent mod, The Enduring Evil. So you can see the obvious ulterior motive here, but I figured I might as well make this available to the rest of the community, as well...