Either Freeze GG or atomisation. I'm voting incon.
Here's some of Ruby's abilities that can help Ruby
Acrobatics (Enhanced Condition & Hypermobility: Ruby constantly jumps dozens of meters in the air unassisted and spins around so quickly and frequently that she is just a red spinning blur whenever she fights. Same with falling, every student at Beacon is taught to have a proper landing strategy in their first active field training mission[1][2]. All-Terrain Mobility: As shown in the fight against the Nevermore[3]. Also the ice fights against Team ABRN[4] and the Colossus[5][6]. Self-Momentum/Inertia Manipulation: With Crescent Rose. Surface Running: Same reason as All Terrain Mobility. Plus she has a few instances of running on walls[7]. Mid-Air Jump: With Crescent Rose)
Flight, Heat Manipulation, Duplication, Intangibility, and Matter Manipulation (Molecular), Teleportation, Dimensional Travel, BFR (via Semblance. As
explained by
Penny, she can disassemble herself at a molecular level using her Semblance, allowing her to go around obstacles or through paths she couldn't before)
Subjective Reality, possibly Law Manipulation and Physics Manipulation (Magic from the Ever After "breaks the natural laws of our dimension and universe" - despite/due to being a UES and not existing in Universe 7 or the Demon Realm - thus allowing characters to maximise its utility and versatility by wielding their imagination, such as Penny using "Cold Fire" that is capable of neutralizing heat/fire or Ruby using magic to shrink down Crescent Rose when she was turned into a kid. Ruby even says she just thinks about what she wants to do and it happens with her magic)
Information Analysis (Capable of analyzing her opponent's fighting styles, habits and techniques - allowing her to adapt, predict and react accordingly)
Analytical Prediction (Like Goku, during her fight against Hit, she managed to predict his movements after he skipped time by 0.5 seconds, allowing Ruby to counter Hit's Time-Skip ability[64])
Empowerment and Reactive Power Level (Battle and Passive [Physical Statistics and Abilities; Ultra Synergy fuels itself with Ruby's strong desire to preserve life, becoming stronger as she fights to protect as long as she focuses on this mindset without limit. Her power is based on confidence, and drive to do her perception of good. Although not as fast as Ultra Instinct or Ultra Ego but has a greater control of movements and power distribution/control)
Instinctive Action (Form her Ultra Instinct)
Limited Space Survival (Can make herself a artificial atmosphere by using magic that lets her fight out in the vacuum of space)
Also Ultra Synergy Kaio-ken x20 + Ultra Instinct + Petal Burst