Plaguefall un soloable now w/out pets?

After spending about 20 minutes killing globgrog as vengeance DH, which I cannot even see as possible for a lot of classes since you need to oneshot the slimes, I had to give up at ickus. No matter what you do the slime injection will just be impossible to out sustain at 5-6 stacks, and the one minute timer means you can’t even kite him out. Jumping away cancels his cast, but he does his ranged spam and will have it back up before you have jump. Am I missing something? Can you just not get the mount anymore unless you’re like a hunter? Or can you still skip bosses on solo? I’m just lost.

I skipped the first two bosses on PF and only did the last two to get the slime mount in 9.0. Did they change it to where you have to do all bosses now? I thought that was only for renown if I am not mistaken.

Plaguefall

You must now defeat the first three bosses of the dungeon before the door to Margrave Stradama opens on all difficulties.
    Developers’ note: The first two bosses of the dungeon were frequently being skipped in lower-difficulty dungeons, typically by groups who were trying to earn Renown much faster than intended. To improve players’ Renown earnings, we’ve also added a chance for Renown to be earned by completing layers in Torghast (see hotfix below).

from their July 21st hot fix notes. Really sucks now you have to clear the dungeon to get the mount where they didn’t have that originally. Goes back to “fun detected” mode. They need to realize that renowned grinds royally suck and players are tired of all of the grinds in place. This is just a consequence of people aiming for the mount get punished due to poor implementations in the game.