Talk:Irelia/@comment-24082086-20150629103711/@comment-14081808-20150630135740

It depended on the situation. If you felt you needed the 10% MS to keep up with your lane opponent, then obviously Zephyr. Less mobile enemies you could get significantly more out of BorK, especially with the tank meta. The loss is 10% AS, not much by any standard, but enough to make Zephyr a contender for the spot.

AD opponents made Zephyr look better as to could get Tabis and still have tenacity. AP made Mercs better and why stack Tenacity since the game doesn't.

And either way, you still buy AD, just less with Zephyr.