'Bah!' and 'humbug!' I say. While multiple man looks pretty good on the surface, I find he rarely comes up in a way he's usable. If you aren't able to get all 3 copies into play (because 1 or more of them are in the discard pile) you're paying 4 resources and 1 card (possibly 2 if both of the multiple mans are in your hand) for 2 allies with 1/1/2 a stats. So he'll net you a 2 ATK or THW and then each of them will (most likely) block a blow.
While blocking 2 hits is pretty good, the cost of 4 just makes him unpallatable for me. Seeing as that's all you'll be doing that turn. I'd much rather play two allies in consequetive turns. Also giving me the flexibility to change plans should that be needed.
As always: Don't let yourself be tempted by the 'one in a million' chance that you've got your board set up and you pull into the first copy of Multiple Man with 2 'double resources' into your hand. There's just more consistent cards out there that'll do more work.