noway you can kill barb with a single hold person - you can hold and tent with 100% success at round 4-5. Force bolt was like 80-120 so you can deal about 500-600 damage top without tenting. Barbs even when you was just added was above 600hp. In ancient time with cone of cold you surely could kill 500-550 hp warrior (delevel hp loss and low hps in general made tanks below 600 naked).