Is physical damage good for Sayu?
For physical DPS, Sayu benefits the most from the four-piece Pale Flame artifact set, which increases physical damage by 25%, and increases attack by 9% whenever an elemental skill hits an opponent. The effect can stack twice, which also increases Sayu's physical damage further.
Sayu's healing power scales off to her maximum attack. So, players should focus on stacking ATK% while building Sayu as a healer. In addition to ATK, the Energy Recharge should also be sufficient to increase the consistency of healing from her Elemental Burst.
The main stats to look out for are ATK Sands, Anemo DMG% Goblet, Crit Rate/Crit Damage Circlet depending on your crit rate. 4-piece effect: Increases Swirl DMG by 60%.
Sayu's optimal Artifact sub-stats are Elemental Mastery and Energy Recharge, for the same reasons discussed above. ATK% is also useful on her, since this will increase her damage and her Burst's healing at the same time.
While you shouldn't expect your typical Eula to deal that much damage, she is still the best Physical DPS in the game. Even with little resource investment in her weapon and artifacts, you can easily deal over 100,000 damage with her Elemental Burst.
Pyro has always been regarded as one of the most powerful DPS elements in Genshin Impact due to its diverse character options, Pyro resonance, and extremely strong Elemental Reactions such as Vaporize and Melt.
For a damage dealer Sayu, the best option would easily be Viridescent Venerer, but Gilded Dreams is also viable. 4-Piece Bonus: Increases Swirl DMG by 60%. Decreases opponent's Elemental RES to the element infused in the Swirl by 40% for 10s.
C1 Sayu's effect adds one of her best features. It allows her Elemental Burst to attack enemies and heal allies simultaneously. That is important for Sayu as a Support since it will allow her to Swirl and reduce enemies' resistance while healing the active character at the same time.
Characters | Ages | Heights |
---|---|---|
Sayu | 14/15 | 4'6" / 138 cm |
Shenhe | 25-30+ | 5'5" / 165.1 cm |
Shinobu | 16-18 | 5'2" / 158 cm |
Sucrose | 18 | 5'2" / 157.4cm |
If it's not enough, you might need to take a look at your Artifact sub-stats and try to aim for any which have Energy Recharge. Getting Sayu's ER stat to about 150 percent will be plenty to juggle her Burst.
What is Sayu best f2p weapon?
Skyward Pride is the best weapon Sayu can wield in Genshin Impact. The high Base ATK alongside its Energy Recharge secondary stat allows Sayu to continuously use her Elemental Burst, providing as much healing as possible.
The amount of HP restored is based on Sayu's ATK. This skill then summons a Muji-Muji Daruma. Muji-Muji Daruma: At specific intervals, the Daruma will take one of several actions based on the situation around it: If the HP of nearby characters is above 70%, it will attack a nearby opponent, dealing Anemo DMG.

The short "tl;dr" answer is Physical/Elemental DMG is often better, but attack% can be better if you have good substats. Attack is used as the source of all damage, so increasing attack will increase all damage dealt from a character. However, getting attack ≠ damage.
Someone More Capable (1st Ascension Passive) - When Sayu triggers a Swirl reaction while active, she heals all your characters and nearby allies for 300 HP. She will also heal an additional 1.2 HP for every point of Elemental Mastery she has. This effect can be triggered once every 2s.
If you want more powerful healing, then you need to increase Sayu's overall damage. To make Sayu your newest healing superstar, you'll need two things: Skyward Pride or Prototype Archaic. Four Viridescent Venerer artifacts.