You'd be surprised how little I care about your opinion. Your analysis and testing, yes. Your opinion, no. Sadly, your post is all the latter and none of the former.
In my opinion the best enchant now the Black Magic in T9+ gear for Mutilate
Changes: "Patch 3.3.0 (2009-12-08): This enchantment now sometimes increases haste rating for the caster rather than inflicting the caster's target with a damage-over-time effect. It is also now triggered by landing any harmful spell rather than inflicting damage with a spell."
250 haste rating for 10 sec
Only proc in posions and you can enchant into only one weapon. (not stacking)