Breach closes way too quickly

ED/contagion lich.

Breaches (currently on t5 maps) close in about 15 seconds. About 5-10 seconds in is when enough monsters spawn for my dots to start proliferating effectively. By then it’s too late - not enough mobs are dying to extend the timer. I’m not having an issue killing the mobs once they spawn.

Delirium lasts for ages now, but breach is gone like a fart in the wind :(