I have minimal IAS, and I fire off strafe very, very quickly. However, multi is very slow, and eats up mana much faster than I leach it.
I'm using an amn'd windforce. It's killing power seems to be pretty good vs faith.
I think that strafe requires a bit more strategy, but I have an MF build rather than an IAS build. Being glued to the spot isn't much of a threat with valk, merc, and decoy.