REWORK ON DREDGION CAPTAIN

Dredgion captain spawn condition must be reworked. My suggestion is that it should spawn 15min after the start of the dredgion, instead of spawning after 5 surkanas destroyed.

This will prevent groups rushing straight to captains room in the goal of ending it, this method is starting to be more common and dredgions are so quick ~5min. Not enough time to a team to contest the rush.

A change like this will make dredgions more challenging and last longer ~ 20min. People should explore the instance in the goal of earning more points through PVE and PVP.