hola,
anytime I encounter these teleporting ghost I do this: - find a corner
- put everybody in very tight formation, mages on back, fighters on front, make sure there is no space in your group by moving cursor around , looking for the 'four leaf clover'
- pull them, wait till they are all in front of fighters, then use any AOE like fireball , searing seal or jolting touch (best from stiletto or bow) in the Lighthouse case: - there is a nice tight corner on the top-left side of the 1st floor room (don't use the right side room, that one is too big, they port behind you)
- rogue triggers the event and then use invisibility and run away
- alternatively priest can trigger and use Withdraw (best when he's beaten a little, so he stays out of combat longer) - when most of the ghosts stands right in front of your group, release the AOE hell (in my case Cloudpiercer bow)
hope that helps