Today in PoS like a bunch of noobs the pug i was in wiped during the tunnel part. I am a rogue so i kept on running up towards the boss after i used vanish, he was there and i engaged him.
After which i popped an always useful noggenfogger and jumped off the boss platform down to where the rest of my group was running back, i kited him the whole way back to where the first boss (forgemaster) is before the healer decided to go get a donut and let us all die.
So a rogue/druid may be able to stealth past ALL trash after second boss, run up and engage the last boss and jump down to where the second boss was, this will save a ton of time.
RECAP:
1. Stealth trash after second boss
2. Engage scourgelord Tyranus
3. Slowfall/noggenfogger off boss platform
4. Pull him to your tank and win