Use Blade of Wizardry with Star-Heart Lamp(drops from BM), they rly kick ass. And dont ever think of SELLING this shit if u rly dont need money

As a lock I dont think I'd do it since you loose so much to get this gain which goes againt your class build. You could if you have massive amounts of mana. Because if it does produce a spell haste alot it will eat your mana up. Also you have to take into accout the life tap to regain mana, so if you loose stamina and crit on your main hand weapon you need to make it up somewhere else. This can be done, you just need to calculate it all out with what is available and obtainable for a few hrs.
You could look around for other gear to make up the crit and intel and stamina loss for other hand, and loose a little spell damage from other items to also make up the stamina and intel. loss on higher stamina, intel. & crit. gear.
The haste would def give you an advantage, but you just need to re-adjust your whole build and work around the losses in accordance to the gains this sword has.