Mordekaiser must control the lane with medium pressure and force extended trades where his passive and (W) shield sustain outlast Rumble's short burst trades.
Focus on denying Rumble the ability to safely use (Q) in danger zone and avoid giving him free poke windows by managing wave state and spacing.
Trading pattern
Initiate trades by landing (E) to pull Rumble into your passive range, then hit isolated (Q) for maximum damage.
Extend trades only when your passive is active and (W) shield is charged to outlast Rumble's short burst.
Punish (E) cooldown and overheated state by forcing longer trades where his damage drops off.
Danger windows
Be cautious when (E) slow is up and (Q) danger zone is active, as he can bully short trades.
Avoid fighting when Rumble overheats early, as he gains empowered autos and spells that increase burst damage.
Respect (R) zone control in chokes or river fights, which can cut off your escape and force unfavorable duels.
Early game
Use early levels to threaten (E) pulls and zone Rumble away from minions to prevent him from stacking heat effectively.
Avoid extended fights before level 6 unless (E) lands, as Rumble's early heat-managed trades can punish missed engages.
Keep the wave slow to maintain threat range and prepare for level 6 isolation.
Power spikes
At level 6, use (R) to isolate Rumble and force duels he cannot kite, timing it after landing or threatening (E).
First AP bruiser item spike increases your durability and damage, enabling longer trades; force fights when (E) or wave control keeps Rumble close.
Respect Rumble's level 6 (R) for zone control and his first AP item spike by avoiding extended trades inside his danger zone (Q) and (R).
Win conditions
Use wave and (E) pull pressure to force Rumble into extended trades where your passive and (W) shield win sustained fights.
At level 6, isolate Rumble with (R) after landing (E) to prevent his escape and jungle help, securing kills or forcing summoners.
Deny Rumble safe use of his (Q) danger zone by controlling spacing and wave state, preventing him from snowballing lane pressure.
Tip: For Mordekaiser vs Rumble, read overview, trading pattern, and danger windows first for a fast Top lane check.