The resist debuff from onslaught depends on the weapon damage type. So I am curious what weapon damage type people are using in combination with onslaught. Are you using 100% physical, 100% one element, or a spread of elements like valorite enhancement? Also are you tailoring your weapon damage to the mob (I.E. 100% fire for undead + onslaught) you are fighting? It gets expensive having a weapon type for every element - not to mention trying to cover slayers as well.