So, this is a guide for the new Boss I made for my guildies that I would also like to share with you.
I've come with a way that I think is easy and accessible to most so that might and special heroes aren't a requirement.
1 hero with revive (better if it also has slow down, like Siren)
1 PD ideally with Zerk+Revite+(Blitz) combo
1 hero with ranged attack and slow down talent or crest
2 heroes with slow down talent or crest
1 Ice Demon with 7/10 skill (6 might work too)
Other than that, no special talents/artifacts/skills are required.
First, drop the hero with revive far from the center to pull the Goblin away from the Boss
Second, drop the ranged hero to attract the Boss
Third, when Boss starts walking, drop all the rest on top of him to permaslow him
Rationale: it's necessary to permaslow the Goblin far from the Boss because he's very quick
Click here for Video
Hope it helps you. Cheers!
For the Goblin alone, it shouldn't be so difficult and you're free to use whatever method works best for you.
In the video I'm using DD with LD/Goblet to tank and the other heroes with Scatter.
Edit: added last part
LAVA 3 without Arctica:
HBM AA - AE Base and Tips: