Fully agree with Sac here. I went the way through maximizing crits and then slowly replacing a few crits here and there as I closed in on 100% crits (of course vs even con etc, just the rating) with some casting speed here, recover speed there and added up with the Levi robe that procs 20% BoE to cover up a crapload of BoE need. :p And of course, base damage increase beats everything, but I'm sure you already knew.
So, prio Basedmg > Crits > Cast speed > BoE > Reuse if the amounts of either is pretty equal. 100% cast speed would of course prio higher than 2% base damage etc, but ye... :p