Ivan vs Four Great Rulers: who would win?

Ivan favored — Slight edge (~55%)

Ivan · Power Rangers · Dino Charge

Tier

5-A

Attack Potency

Large Planet Level

Speed

Massively Ftl, up to Massively Ftl+

Durability

Large Planet Level

Four Great Rulers · Genshin Impact · Base

Tier

5-A, up to 2-C

Attack Potency

Large Planet Level, up to Low Multiverse Level

Speed

Ftl

Durability

Large Planet Level

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