Lex Luthor (CW) vs Grima: who would win?

Grima favored — Favored (~65%)

Lex Luthor (CW) · DC · Enhanced with the Harun-El Serum

Tier
LOW 7-B
Attack Potency
Small City Level
Speed
Athletic Human, up to Sub-Relativistic
Durability
Small City Level

Grima · Fire Emblem · Echoes

Tier
7-B, up to 4-A
Attack Potency
City Level, up to Multi-Solar System Level
Speed
Superhuman, up to Massively Hypersonic
Durability
Large Island Level, up to Multi-Solar System Level

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