It seems like they should be BIS, a 25% dmg increase on one piece of gear! It does kind of fuck with other skills/slots though, since losing another piece of raekors means RRoG and no leoric's crown. but what about ditching the vile wards?

I think yan's are a 1.25x multiplier right? and viles are only additive, so yan's pants are basically equivalent to 35% viles hitting 7.5 mobs (ie, your dps will increase against all solo non-horder packs). Since pushing GR45 time is mostly spent on killing the RG, shouldn't yans be BIS? its almost a flat 25% dmg increase for a wrecking smash FC barb. so unless you are fighting Saxtris it would be a huge buff against RG.

edit: also, do viles apply retroactively, or is it only for every subsequent mob thats hit. because if this is the case, viles need 14 mob hits to do the same overall damage as yans.