Hey Vontre,
I was playing with the magegraf.com version trying to model the impact of a totem of wrath for mage vs. warlock (very nice program btw

). I did get a surprising result that I wanted to run by you to see whether or not its a bug.
If I add 67 crit rating to a shadow destro warlock, I get a 3.44% DPS increase (3% personal plus 0.4% due to ISB) which is exactly what I predicted from the math. When I do it for a mage though, increasing crit rating by 67 only gives a 2.15% DPS increase instead of the 3.3% (crit plus ignite damage) I was expecting to see. Is this a bug in the program or is it accurate? If it's accurate, would you mind explaining to me how you arrive at that value?
Also, on an unrelated note, may I ask what are the assumptions that you put into the ISB uptime calculation (ie number of spriests and aff locks vs number shadow destro)? My apologies if you've posted it somewhere else; please just shoot me a link if thats the case. Thanks for the nice tool, and thanks in advance for the help!