Vayne will randomly use his two cinematic attacks, Azure Vortice and Contempt, which deals around 600 - 1,500+ damage to all characters in range. Even if all the Sephira Swords are destroyed Vayne can still execute his cinematic attacks; the swords will not disappear when destroyed, rather, they will surround Vayne.
When 50% of his HP is drained, a cutscene will follow, and Vayne regains his positive statuses, at which point the player should recast Dispel. Vayne will attempt to execute more special attacks, such as Tree of Sephira, Inviolable Wall, and Limit Break, which increase Vayne's overall stats. He can also build a Magick Anti-Magick, which negates all magick attacks. His final cinematic attack, Tree of Sephira, hits for about 2,000+ to all characters in range.
When fighting Novus, the party can either Berserk one character, or rely on Gabranth to attack the Sephira Swords. Whatever the player's choice would be, they should focus all of their fire power on Vayne since the swords move fast. The party should quickly Dispel his positive status effects, and cast some positive statuses on the player party members. Judge Gabranth may have good stats, but he rarely heals.