Lux Imperator vs The High Priest: who would win?

The High Priest favored — Slight edge (~55%)

Lux Imperator · Doctor Who · Base

Tier

HIGH 1-C

Attack Potency

High Complex Multiverse Level

Speed

Below Average Human, up to Nigh-Omnipresent

Durability

High Complex Multiverse Level

The High Priest · Toaru Majutsu no Index · Base

Tier

HIGH 1-C

Attack Potency

High Complex Multiverse Level

Speed

Sub-Relativistic

Durability

High Complex Multiverse Level

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