The top Barbarian King loadout is Spiky Ball + Earthquake Boots. Full tier list, best 2-slot combos and upgrade-stop levels below.
The original tank — his loadout turns him from a meat shield into an aggressive wall-breaker and compartment cleaner.

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 Blacksmith opens at Town Hall 8 — Earthquake Boots is the best Common King piece. Pair it with Rage Vial until you earn an Epic like Spiky Ball.
Equipment levels are still capped low at Town Hall 9 — keep Earthquake Boots as your core.
Common gear reaches Level 12 now; Earthquake Boots + Rage Vial is the best free-to-play Barbarian King setup at Town Hall 10.
Epic caps rise to 15 at Town Hall 11 — push Spiky Ball if you own it.
At Town Hall 12 the best free pair is still Earthquake Boots + Rage Vial; prioritise an Epic for your second slot.
Start spending Starry Ore at Town Hall 13 — Spiky Ball is the King’s #1 piece.
Common reaches Level 18 and Spiky Ball can push further; the standard war loadout takes over at Town Hall 14.
Spiky Ball + Earthquake Boots is the meta at Town Hall 15; Giant Gauntlet + Snake Bracelet builds a super-tank King.
With Epics maxing toward 27, Spiky Ball + Earthquake Boots is the best Barbarian King equipment at Town Hall 16.
At Town Hall 17, run Spiky Ball + Earthquake Boots for war, or Giant Gauntlet + Snake Bracelet to tank for the Queen.
At the newest Town Hall 18, max Spiky Ball + Earthquake Boots; Giant Gauntlet + Snake Bracelet remains the super-tank option.
What each piece does, its tier and rarity, and the level to stop upgrading at.
Bouncing projectile hitting up to 8 targets — the King’s best damage tool.
Enlarges the King for up to 60% damage reduction and a huge HP boost.
Releases distraction snakes that soak single-target fire.
Lets the King leap over walls with a speed + attack boost on landing.
Ground shockwave that cracks walls — the best Common King piece.
Temporary move + attack speed; too short at high TH.
Summons Barbarians that are vaporised by splash — waste of a slot.
Heals per strike but cannot sustain against TH14+ damage.