Mika in Genshin Impact fills a very unique support niche that makes him very easy to farm Artifacts for. This is because you basically just have to use him for his Elemental Skill, which has almost nothing to do with his Artifacts. So what other characters need or want is more important when choosing Artifacts for Mika.
For starters, stats that you should focus on for Mika are his Energy Recharge and HP. His heal scales off his HP and he needs a lot of Energy to use his Burst. As mentioned earlier though, you really can put whatever you want on Mika. His stats don’t matter at all. In that sense, it’s almost ridiculously easy to build Mika because you don’t have to bother picking Artifacts with the best stats. Even if he’s absolute trash as a unit, he’ll still be an amazing asset to your DPS characters.
Some Artifacts that you can consider for Mika are:
4 PC Noblesse Oblige
Though the healing from Mika’s Burst isn’t anything to write home about, you can use his Burst to boost the Attack of your party. Since his Skill will also increase the Attack Speed, this will greatly enhance your overall DPS. Noblesse’s 2-piece bonus increases Elemental Burst DMG by 20%. At 4 pieces, it increases the ATK of all party members by 20% for 12 seconds when he uses his Burst. As a reminder, the 4-piece effect does not stack. So if you plan on running Mika with someone who already has the 4-piece Noblesse set, you should swap Mika’s Artifacts for something else.
4 PC The Exile
It’s very rare to recommend an Artifact set that doesn’t have any 5-stars, but Mika doesn’t need anything good. When you equip him with a 4-piece of The Exile, he regenerates 2 Energy for all party members for 6 seconds. Though Mika generates quite a bit of particles with his Skill, his Burst is fairly expensive. So if you want to be able to use it off cooldown, you need to put some effort into increasing his Energy Recharge. Depending on who you use as your DPS, an Exile Mika might be better for your damage. For example, characters who solely rely on their Burst for damage such as Cyno might prefer an Energy boost rather than an Attack buff.
2 PC Emblem of Severed Fate + 2 PC Tenacity of the Millelith
This is a chimera set that aims to position Mika as your main healer. Whereas Noblesse and Exile are ones that work best for a Mika who’ll boost your DPS’s damage potential, this combination makes the most of his Burst. A 2-piece Emblem set boosts Energy Recharge by 20% and a 2-piece Tenacity set boosts HP by 20%. This will help to recover Mika’s Burst faster, as well as increase how much HP he heals.
As a reminder, Mika’s heal is very similar to Qiqi’s. You can only recover HP when you are in the Eagleplume state and hit the enemy with a Normal Attack. Mika’s healing also only affects the on-field character. Even when you unlock Constellations for him, he cannot heal other members of your party. So keep that in mind when building a team for Mika.
Genshin Impact is readily available on the PS4, PS5, Windows PC, and mobile devices. Mika is available in the gacha at all times since he is a 4-star.