WotLK Mutilate/Blade Flurry

Y'all try this yet? Because I am getting phenomenal DPS in this spec. It's quick, it's snappy, it's great for heroics, it's awesome in raids. You slice and dice and cleave and weave through every fight, changing targets is no problem. About 60% of the damage is from "spells" via instant poison, envenom, and deadly poison, so you don't want armor pen at all. Hit cap and expertise cap are priorities followed by attack power, agi, crit, and haste. Glyphs should prioritize mutilate, and slice and dice. The remaining slot can be filled with fan of knives, or blade flurry for aoe damage, tricks of the trade for raid damage, or feint to reduce raid damage taken. Your best opener is mutilate from stealth followed by slice and dice if you don't have the buff yet, if you do, envenom only when you do not have the envenom buff, or when you are about to energy cap, slice and dice can be refreshed to a 18 second duration for 1 combo point from ruthlessness if needed.