Gulbjarn is the star of the show here!
Protect him with Psychic shield and Bloodlust.
Heal him with Clan of the Elk and Skytear Mine.
If it's defeated no big deal! Resurrect him with Guard Pillar.
Stone Pillar, Death Grasp, and Overwhelm will make sure he can destroy all 3 monsters in 1 swipe.
Designed for the One Bear Army achievement.