How do her Elemental Burst, A4 Talent and 4pc OHC “Flatten/Normalise” her damage output?
These talents add significant Bonus Flat DMG to Kokomi’s attacks, and 4pc OHC adds further damage based on healing. These scale from HP and Healing Bonus.
Conversely, Normal Attack and Elemental Skill talents scale from ATK, and contribute to a minority of her damage output even when well invested.
Kokomi’s Burst scaling gives the same damage increase to all Normal Attacks, and “flattens” the initial difference between specific hits in a combo. Song of Pearls similarly gives the same boost regardless of hit. Lastly, 4pc OHC makes up a notable amount of her damage, and synergises with the aforementioned damage sources by also scaling from the same attributes.
Therefore, her Elemental Burst and A4 Talent in particular can be considered to reduce the differences in damage with individual attacks, and consequently makes investments in Normal Attack talents and ATK less valuable.
Is it a problem that Kokomi cannot CRIT?
See Passive: Flawless Strategy in Talent Breakdown.
Should I use Kokomi’s Burst in Freeze teams?
See Freeze section in Teams.
Which artifact set in Bloom teams?
There are several options. It is difficult to state a true Best-In-Slot and it mostly depends on the exact team, your playstyle, and the content faced. In Double Dendro teams where Kokomi will be an important reaction damage dealer, Gilded Dreams and Flower of Paradise Lost can be very efficient in maximising her Bloom damage. The downside of these sets is her healing will be lower than normal, which can make survivability difficult. These sets also suit high EM stat investment, meaning without HP and Healing Bonus artifacts her non-reaction damage will be dramatically low.
On the flipside, Ocean Hued Clam is a viable set in all Bloom teams, with the build’s goal being balanced, Hybrid investment into all useful stats (HP/EM/ER/HB). It’s important to note that Bloom teams can have lots of EM buffs via Nilou, Key of Khaj-Nisut, Dendro Resonance, Instructor etc. Since EM is a stat that will have diminishing returns, there can be reduced value investing completely into EM and ignoring other stats. OHC’s damage to a lesser extent Healing Bonus, are unique sources of damage in comparison to EM which is much easier to get from Abyss Buff Cards. Overall, the reduced EM investment affecting her reaction damage can be made up for by increased non-reaction damage and Sea-Dyed Foam explosion damage. This can also improve the team’s versatility and Single Target damage potential.