Need inferno help… Zuk healers wrecking me on colosim

Is there a difference between the Zuk healers on colosim & in the actual game?

Ive practiced Zuk all week. I get to the healers almost every single practice run. The healers wrecked me each time. So I practiced just spawning the healers. After at least 50 attempts I still just straight up get wrecked in the inferno colosim thing. It’s not Zuk hitting me, I can’t even get through a second pass without getting killed even when fully brewed & rigour.

I think im doing everything right. Brewed, bastioned, rigor. Spawn at one edge, blowpipe walk. I hit each healer as I go by. My blowpipe walk seems good.

I just constantly noodle with BP/Bowfa. I take a shit ton of damage from the healers & am almost always dead on my second pass.

I’ve noticed with the colosim the edges aren’t safe from the AoE attacks. Despite maxing DPS potential I noodle a TON. & they have me dead nearly every time I’m doing my second pass by.

Is this actually reflective of in game healers or is something up with the colosim? This is getting ridiculous