so for 10 seconds the chance of any of your guys getting slowed, stopped , or CC'ed is greatly reduced, plus the majority of damage sources will also be greatly reduced. you really need to be playing with a team that starts out with 195 spell resists to get full effect from this as most pvp builds have around 200 spell pen. you're definitely right, it's all about time on target and this is a trinket that helps you do that then it's almost like having a second PvP trinket which is priceless.