it depends what gear
if your using alot of 40/15 stuff
(160/60 120/45) i'd go with 40/15 ias because it will add damage and a shael would be pointless
ohm rune is a retarded SOCKEt.
i have a 40/15 wf and friend has a ohm wf
his does 4 dmg more.
ohm in a low base dmg weapon=you a f*cking retard
40/15 max would be better if you have 147% ias without 15% or 20% from 40/15/shael