Ariu Mikaboshi vs Daleks: who would win?

Ariu Mikaboshi favored — Slight edge (~55%)

Ariu Mikaboshi · Kagurabachi · Base

Tier
7-B
Attack Potency
City Level
Speed
Massively Hypersonic, up to Sub-Relativistic
Durability
City Block Level, up to City Level

Daleks · Doctor Who · Base

Tier
7-B, up to HIGH 1-C
Attack Potency
City Level, up to High Complex Multiverse Level
Speed
Below Average Human, up to Massively Ftl+
Durability
Building Level+, up to High Complex Multiverse Level

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