Atlas (Riordan) vs Githyanki: who would win?

Atlas (Riordan) favored — Slight edge (~55%)

Atlas (Riordan) · Percy Jackson · Base

Tier

HIGH 6-A, up to HIGH 4-C

Attack Potency

Multi-Continent Level, up to Large Star Level

Speed

Massively Hypersonic+, up to Speed Of Light

Durability

Multi-Continent Level, up to Large Star Level

Githyanki · Dungeons & Dragons · Lich Queen

Tier

HIGH 6-A

Attack Potency

Multi-Continent Level

Speed

Hypersonic+, up to High Hypersonic+

Durability

Multi-Continent Level

A heuristic estimate from normalized VS Battles Wiki stats: tier, attack potency, speed and durability.