I couldn't finish 'em. Looks like this's gonna get complicated.
The beasts have a deadly swinging axe and they can surprise Zack with backhand slaps. Occasionally they will attack Zack with their synchronized Twin Tomahawk attack, which is unavoidable. After one of the beasts is slain, they can no longer perform this attack.
Zack should keep his distance from both of the beasts, and try to land some critical hits from behind. The player should be sure to guard whenever they raise their hand, or dodge if possible. It is best to focus on one of the Vajradhara at a time. This may be difficult, but after of one the giants has fallen, the battle will be easier. Magic attacks will do more damage than physical attacks, as the beasts have low Spirit stats.
Vajradhara is the ultimate primordial Buddha, or Adi Buddha, according to the Gelug and Kagyu schools of Tibetan Buddhism. Achieving the 'state of Vajradhara' is synonymous with complete realisation.