Sanctus is a one time boss that appears end of first character section at Mission 11.
60 FPS Cycle - Recommended for Console runners
Roulette Spin → Air Hike → Roulette Spin → Snatch → Roulette Spin → Roulette Spin from Ground Jump → Buster
Safe 120 FPS Cycle - If the Exceeds were good then Buster in Human-state will still kill him in Phase 1
Snatch from Ground → 3 hits of Combo A → High Roller Roulette Spin → Air Hike → Roulette Spin → Snatch → Roulette Spin → Buster
No Trigger Heart 120 FPS Cycle This cycle is good when you don't have full DT-Gauge
Do not DT on the first Snatch while chasing Sanctus Aerial Combo → Snatch DT → High Roller Roulette Spin → Air Hike → Roulette Spin → Snatch → Roulette Spin → Snatch → Slash → Buster
Risky 120 FPS Cycle - 2nd Jump is the hardest part refer to the video demo on how to salvage the situation
Roulette Spin → Air Hike → Roulette Spin → un-DT Jump DT Snatch → Roulette Spin → Air Hike → Roulette Spin → Snatch → Roulette Spin → Snatch → Buster
The loading-screen can throw off Buster timing sometimes, so always be ready to react after the cutscene skip
If Sanctus is too high due to EX3-High Roller then Roulette Spins from the 2nd set will knock him far away
Nero [M11 Sanctus] - 60 FPS Optimal Phase 1
Nero [M11 Sanctus] - 120 FPS Safe Phase 1
Nero [M11 Sanctus] - 120 FPS Scuffed Risky Phase 1