Are you going to nitpick this? You posted your own data over on bugs, in a separate thread from the other haste bug thread. There's plenty of data showing that haste IS lowering cooldown. Just not epic haste. Which is the bug. If you want the extra 0.665 seconds between each backstab, go with a good haste item. If you don't care, keep your rbg. As far as I know, epic is functional on regular attacks so it won't be a problem.
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