Sampo Koski Build Guide: My 2026 Wind Shear Journey

I still remember the first time Sampo Koski slid into my roster with that sly grin and a handful of dubious promises. I expected a comic relief unit, but what I got was a 4-Star Path of Nihility damage-over-time specialist who quietly became one of my favorite Wind breakers. In 2026, when I look at my account and decide who deserves a fresh build, Sampo still earns a nod whenever a Wind-weak enemy shows up. His bouncing skill is excellent for cracking Wind toughness, and his Wind Shear stacks let him keep pressure on enemies long after his turn ends.

Sampo is not the most plug-and-play character I have ever built. He asks me to balance Effect Hit Rate, ATK, Crit Ratio, and Break Effect more carefully than my straightforward carry units do. That extra juggling used to annoy me until I understood his rhythm. He wants to land his debuffs reliably, stack Wind Shear, and then let those damage-over-time ticks do their work. When I get his stats right, he feels less like a con-man and more like a very persistent accountant who keeps sending enemies bills they cannot refuse.

Why I Still Build Sampo in 2026

My core reason has not changed: Sampo is a great option for breaking Wind weaknesses, and his DoT application gives him value beyond raw burst damage. I also treat his Wind Shear as a debuff when I plan around cleanses. Characters such as Bronya, Natasha, and March 7th can cleanse debuffs, and those same abilities can remove DoTs. That tells me the game categories DoTs as debuffs, which matters when I choose Light Cones and teammates.

I would not call him simple. He is a rhythm character. I enjoy that. When I want a low-maintenance DPS, I pick someone else. When I want a Wind breaker who can also chip away at enemies through stacked Wind Shear, I pick Sampo and start humming his theme.

Sampo's Best Light Cones

I tested several Nihility options, and my shortlist still looks like this:

Light Cone	Rarity	What I Get From It
In the Name of the World	5-Star	24% DMG against debuffed enemies; after using skill, 18% Effect Hit Rate and 24% ATK
Eyes of the Prey	4-Star	20% Effect Hit Rate and 24% DoT increase; my favorite signature fit
Good Night and Sleep Well	4-Star	12% DMG per debuff on the target, stacking up to 3 times
Void	3-Star	20% Effect Hit Rate for 3 turns after entering battle

In the Name of the World is the luxury pick. Because I treat Wind Shear as a debuff, the DMG bonus against debuffed opponents feels natural on Sampo. The skill-based Effect Hit Rate and ATK buffs also line up with what I want from him. Eyes of the Prey is the comfortable everyday choice. It is his signature 4-Star Light Cone, and the Effect Hit Rate plus DoT increase are almost tailor-made for my Wind Shear plan. Good Night and Sleep Well rewards me for stacking debuffs, and Sampo can stack Wind Shear up to 5 times, so I rarely struggle to reach its three stacks. Void is the budget answer. It is a 3-Star Light Cone, but the 20% Effect Hit Rate for 3 turns after battle starts helps me stabilize his early debuff landing.

Sampo's Best Relics

My relic plan is simple: boost Wind damage, make his DoT more reliable, and give him enough ATK to matter.

• 4-Piece Eagle of Twilight Line: The 2-piece bonus gives 10% Wind DMG. The 4-piece bonus advances his next turn forward by 25% after he uses his Ultimate. I love this because it lets Sampo take another turn sooner and keep the Wind Shear pressure flowing.

• Pan-Galactic Commercial Enterprise: This is my favorite planar set for him. It gives 10% Effect Hit Rate and converts Effect Hit Rate into ATK, up to a maximum of 25%. That is a clean double win for his DoT.

• Space Sealing Station: When I want a more direct ATK push, this set gives 12% ATK, and if his Speed reaches 120 or higher, he gets another 12% ATK. It is a strong alternative when my substats already cover his Effect Hit Rate needs.

My stat checklist looks like this:

Stat	Why I Care
Effect Hit Rate	I want his Wind Shear to land consistently
ATK	It feeds his DoT damage
Crit Ratio	I use it to lift his raw damage when I have room
Break Effect	It helps him punish Wind-weak enemies

Sampo's Best Team Compositions

I like Sampo as a Wind-breaking specialist in teams that need one, but I also enjoy him as a DoT damage dealer when the lineup supports him. My favorite shell includes Asta, Welt, and Natasha. Asta's speed buffs let me manipulate turn order, Welt shreds enemy defenses so Sampo's attacks land harder, and Natasha keeps everyone alive. If I have Bailu, I can swap her in for Natasha without changing the plan.

When I do not have Welt, Pela is my replacement for a similar defensive-shredding role. I can also slot in a carry character if I want more direct damage. The key for me is to give Sampo enough support to survive while his Wind Shear stacks pile up. He is not a one-button miracle worker, but he is a satisfying team piece when I build around his strengths.

My Final Take

In 2026, I still see Sampo as a slightly demanding but rewarding 4-Star. He wants Effect Hit Rate, ATK, Crit Ratio, and Break Effect, and he rewards me with Wind break utility and steady DoT pressure. I would not recommend him to someone who wants zero setup. I would recommend him to anyone who enjoys a sly underdog with a bouncing skill, a stack of Wind Shear, and a knack for making Wind-weak enemies regret their choices. 😄