Talent Priority:
Her normal attack does not go up.
Her Elemental Ability should be maxed out to benefit herself from the charges and do more damage in the rotation; this, on balance, compensates for taking Shenhe to Damage and not Triple Attack.
Her Elemental Burst reduces Cryo resistances which benefit Ayaka's team, but the physical resistance reduction is not best in Eula's slot.
The ideal setup would be 1/10/9 in terms of Talents.





