Posted by Kpul in Arena Junkies:

“When you vanish, you get your vanish buff but you arent actually in stealth mode yet.   So when you vanish just hit stealth as if you are reentering stealth and anyone who is in combat with you, as long as you are the only person they are in combat with, will drop combat. and you will be able to sap them

so for anyone new to rogue if you wanna look fly in AB or any flag capping map.   if someone is defending a flag and you blind and try to cap they obviously are going to trinket.. so while they are still near flag you can just vanish > stealth > sap instantly and recap for the finesse cap.”