The 28,000 Power gate
The Castle Trial requires 28,000 Power. The published math requires the Grey Sword, Noble Cuirass, and Berserk and Life potions active. Anything less is a guaranteed failure.
Vampire and Werewolf swarms
The Castle is dense with Vampire and Werewolf packs. The Light Sword's falling-sword ultimate is meta specifically because it can clear a pack in one cast. Frost Runes slow the pack to buy you the cast window.
Hell Mode and the Dark Cube
Hell Mode is the only path to the Dark Cube. The Dark Cube is the only path to Haunted Weapons, which bypass the entire Magmite forge economy. The EHP calculator models the Hell Mode Arbiter's true-damage ultimate directly.
Companion synergy
A high-level Starfall or Earth Malls Companion meaningfully shifts your aggregate Power. Inside the Castle, that can be the difference between clearing Trial and bouncing off the gate.
