The top Minion Prince loadout is Dark Orb + Dark Crown. Full tier list, best 2-slot combos and upgrade-stop levels below.
A glass-cannon support hero — slow the defenses so your main army cleans up untouched.

Every piece ranked S to F for the current meta. S-tier earns your Ore first; F-tier should never be upgraded.
You equip two pieces per attack. These are the strongest pairings by situation.
You don't unlock everything at once — common pieces come from the Blacksmith, Epics from events and the shop. Here's the loadout to run as you progress.
The Minion Prince unlocks at Town Hall 14 with Dark Orb — the best Common support piece. Pair Henchmen Puppet for free, or Dark Crown if you own the Epic.
Epic caps reach 24 at Town Hall 15 — Dark Orb + Dark Crown is the goal; Dark Orb + Henchmen Puppet is the free fallback.
Dark Orb + Dark Crown is the best Minion Prince loadout at Town Hall 16; Meteor Staff + Dark Orb for long-range sniping.
At Town Hall 17, Dark Orb + Dark Crown gives the most consistent output; Meteor Staff + Dark Orb snipes key defenses.
At Town Hall 18, run Dark Orb + Dark Crown for output, or Meteor Staff + Dark Orb to hit any defense on the base.
What each piece does, its tier and rarity, and the level to stop upgrading at.
Crystal that applies 50% speed + attack slowdown to every defense it hits.
Stacks a damage + health buff 3× as nearby allies fall.
Infinite-range meteor — hit any defense anywhere on the base.
Two Henchmen tank fire while the Prince briefly cloaks.
Temporary damage-reduction shield + max-HP bump; situational.
Range + attack-speed boost, but pathing limits its value.