Well, plague only 20 ias.
Wirl ias break is usually easier to reach than traplaying ias, but you should reach both max frames.
So since ur saying WW sin, i assume you will use Highlord which helps a lot.
A little unsure about excactly how wirl works on d2r, but in d2lod it was benefitial to use highest hit chance wep at mean.
Meanwhile Plague + hl is only 40ias.. So since plague dont add crazy hitchance improvement you should defintive us that one offhand.
Wirlwind is 23ias break with runic /gt and traplaying is 42 with runic/gt
So only chaos mainhand reach 9 fpa traplaying, meanwhile both claws reach wirlwind ias breakpoint. And both claws needs to do that.
Plague and Fury are fine to use instead of fool's, but this means you should really focus on visio diadem and high dex. Possible stat quite an ammount of extra dex as well...
If using Fury, then fury should be main hand instead of chaos due to Hitchance bonuses.