Mecha
3 units
Innate: Mecha units can transform into their Ultimate form, upgrading their ability and gaining 40% Health. Transformed Mechas take up two team slots and count twice for the Mecha trait. Use the Mecha-Former item to toggle the forms of your Mecha units
Tiers
3Energy Cells: Mechas gain 25% 
.
4Overclocked Cells: Increased to 40% 
.
6Precision Engineering: +1 max team size
Best comps for Mecha based on trait synergies
The deepest trait stacks per team size (Optimal Tall scoring), recomputed each patch.
Level 8
Pyke2 costPsionic · VoyagerMarked for Death
Gragas2 costPsionic · BrawlerChemical Rage
Aurora3 costAnima · VoyagerHopped-Up Hacks
Urgot3 costMecha · Brawler · MarauderUnstoppable Dreadnought
Viktor3 costPsionic · ConduitPsionic Storm
Aurelion Sol4 costMecha · ConduitDeathbeam
The Mighty Mech4 costMecha · VoyagerGravity Matrix
Master Yi4 costPsionic · MarauderPsi Strikes
Psionic 4Psionic5 carriers2 / 4Mecha 3Mecha3 carriers3 / 4 / 6Voyager 3Voyager5 carriers2 / 3 / 4 / 5 / 6Brawler 2Brawler8 carriers2 / 4 / 6Conduit 2Conduit6 carriers2 / 3 / 4 / 5Marauder 2Marauder5 carriers2 / 4 / 6
Level 9
Cho'Gath1 costDark Star · BrawlerAccretion
Lissandra1 costDark Star · Shepherd · ReplicatorDark Matter
Mordekaiser2 costDark Star · Conduit · VanguardIndestructible
Kai'Sa3 costDark Star · RogueBullet Cluster
Urgot3 costMecha · Brawler · MarauderUnstoppable Dreadnought
Karma4 costDark Star · VoyagerSingularity
Aurelion Sol4 costMecha · ConduitDeathbeam
The Mighty Mech4 costMecha · VoyagerGravity Matrix
Jhin5 costDark Star · Eradicator · SniperSpace Opera
Dark Star 6Dark Star6 carriers2 / 4 / 6 / 9Mecha 3Mecha3 carriers3 / 4 / 6Brawler 2Brawler8 carriers2 / 4 / 6Conduit 2Conduit6 carriers2 / 3 / 4 / 5Voyager 2Voyager5 carriers2 / 3 / 4 / 5 / 6Eradicator 1Eradicator1 carriers1
Level 10
Poppy1 costMeeple · BastionHuddle Up!
Gnar2 costMeeple · Brawler · SniperSlingshot Maneuver
Meepsie2 costMeeple · Shepherd · VoyagerMeep Impact
Fizz3 costMeeple · RogueMeep Bait
Urgot3 costMecha · Brawler · MarauderUnstoppable Dreadnought
Rammus4 costMeeple · BastionGravitational Spin
Corki4 costMeeple · FateweaverAsteroid Blaster
Aurelion Sol4 costMecha · ConduitDeathbeam
The Mighty Mech4 costMecha · VoyagerGravity Matrix
Bard5 costMeeple · ConduitUltra Friendly Object
Meeple 7Meeple8 carriers3 / 5 / 7 / 10Mecha 3Mecha3 carriers3 / 4 / 6Bastion 2Bastion6 carriers2 / 4 / 6Brawler 2Brawler8 carriers2 / 4 / 6Conduit 2Conduit6 carriers2 / 3 / 4 / 5Voyager 2Voyager5 carriers2 / 3 / 4 / 5 / 6