We have the raid move back to the portal area. After grobb spits his slimes, a hunter pulls to there. A warrior fills a rage bar and goes up to near the embalming slimes. As soon as the grobb slimes are dead, the warrior pulls and dumps his rage bar with shout. The agro from the embalming slimes is proximity based. With everyone far away you won't get the random agro.

Anyway, warrior runs around the right wall, as soon as the embalming slimes are out of their room, the whole raid runs past hugging the left wall.

Warrior runs to the front of the instance, this leashes the slimes. They reset, everyone out of combat, warlocks summon warrior.

It cuts a lot of time out.