Your attack speed isn't capped (I think its 200 for dual wielding melee) you should definitely try to cap that. One of my favourite weapons to use for this kind of char is Einherjars (spelling?) fate, they drop from the end of A5, very fast base good damage, and can roll with additional pre- and suffix; and can be socketed! Those will carry you to A3 epic where you can get sabertooth, which is again the best MI until A5 Epic where you can get einherjars fate again. Another thing you may want to do is update your relic if you can!