control rig additive pose

between control rig and final result … can add node like additive blend , imagine after control rig blueprint want to offset some joints , with transform bone can do that but one by one and not precisely… if instead of transform bone can use other skeleton with the final position of the joints , can the control rig have as additive that skeleton? well i try and do not work , maybe doing something wrong…but the point its just transform joints using a pose to add after control rig final calculation