All existing, infused ascended equipment has a +5 Agony Resistance infusion in the Agony Resistance slot by default, in place of the natural +5 Agony Resistance.
Agony Resistance infusions provide +1 or more Agony Resistance.
Artificers can combine two identical Agony Resistance infusions with a Thermocatalytic Reagent to create a single, more powerful Agony Resistance infusion.
-And what about who already have omni infusions on a slot, what happen to the +5 Vitality?