My suggestion is to keep buffs after change scenarios , like change maps or move into portals.
If u wan to remove ur buffs u log out and log in.
This is the best way to avoid "camping" of archers spamming ex's and wiz pre cast 10min stun.
With this camping there is no chance skill overcome the outnumber
I think we should fight for a clean pk, where the one with the best skill prevails.