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AP Master Yi

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Master Yi Mid by Cowsep — updated Jul 25, 2026

Cowsep's AP Master Yi (https://youtube.com/cowsep)

▲ 4

Item Build

Starting Items

you start with 475g

You can bring HP potions too, since Meditate has a long cooldown. I recommend avoiding harrass and just using mana pots and meditate to sustain the lane.

Core Build

You can rush Lich Bane as your first item but I don't recommend it, since without AP ratios it doesn't do a lot of damage. Master Yi is a reset champion, which means Deathfire isn't that synergistic with him, but its such a great item and can help you burst down the first reset, so I still recommend it as a rush.

Flex Items

This basically is a ful.

Summoner Spells

I recommend Ignite so you can get resets

Skill Order

(Q)›

(W)›

(E)

1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
Q		Q		Q		Q		Q
	W						W		W		W	W
			E										E	E		E	E
					R					R					R

I recommend E at level 4 if you're harrassing hard with Alpha Strike, otherwise you can grab E at 3 to improve the CSing.

Runes

AP Master Yi Runes

9× Mark of Magic Penetrationmark
9× Seal of Healthseal
9× Glyph of Scaling Cooldown Reductionglyph
3× Quintessence of Ability Powerquint

+15 Ability Power+16.2% Cooldown Reduction @18+72 Health+9 Magic Penetration

I really like Flat AP to make your Alpha hit harder earlier, and the CDR is great later in the game for meditates and Alpha strikes when you can't get full resets.

You can also rune scaling AP in the blues as well if you just believe you'll always get resets.

Yellow seals can be HP, Mana Regen, Armor, whatever you feel. More HP makes you more durable in lane and lets your meditate heal more.