Well, making an assumption that the crit rate bonus on Evisceration is 10%, what I came out to is this with an excel spreadsheet. If cRatio > 1.640 = DE will win in straight damage almost across the board in average ws damage done comparing DE vs. Evisceration. From there down, it really depends on acc vs. cRatio on which will win to tell the truth. At 90% acc, EV slightly beats DE in the numbers at about 1.500 cRatio.
My basic opinion is that EV should have more potential than DE in almost any pt setting we are in now where a multi hit WS is useable. Chances of us having a high enough cRatio for DE to outperform EV outright are very slim imo. This doesn't even take into account further gear that enhances crit damage like mini expansion gear and than new ra/ex body that does +11dex/agi + crit damage. For soloing TW mobs, DE will be king. Also depends on if they start releasing WS gear with tons of dex and cha on it though, because that could be an equalizer.
Edit: I realize that this is not a DE vs. EV thread, but the ultimate conclusion of this testing should be "When do I switch from DE to EV or vise versa?"
Edited, Jul 1st 2010 1:07pm by Meldi