I will say the frames are garbage and the zombies grab is op for the arena and Christoff's appearance, but a few key points. The gol3ms are annoying until you melee their helmets off by using the dash and uppercut. The lag might make your character do something else or make them move in a direction towards the enemy or in a corner, use right click as a soft reset at points to slow this from happening. Watch out for the red and black variant as his helmet needs multiple melee attacks to take off.

Somehow I survived the zombie arena and it was easy. I didn't lose a single piece of my Tac even from the grabs, it did however kill all my squad in the process.