[MaxWilson]

That's understandable; one out of 36 sling hits will have a +10 bonus because of the open-ended roll. I've tried the Rain of Stones thing a couple more times, though, and ended up with Ironskinned-but-dead Svartalfs fairly frequently. (25%-50%?) It does look like the fatigue is causing critical hits, and possibly Rain of Stones does more than 14 damage. I'll check out the debug log to know for sure.

-Max