I am seeing alot of CB Rogues using fast offhands and I've seen alot using slow offhands. A fast offhand will give you more Deadly Poison procs but a slow offhand will significantly buff Killing Spree. I could see a fast offhand being better for long fights but a slow offhand being better for burst. Correct me if I'm wrong. I'm just wondering if anybody has done some math and/or some tests to figure out which one is actually better.