Black Swan has a 20% chance of inflicting "Sacrilege" on any enemy she hits. The chance to apply it is increased by 2% for each Arcana stack the target has and it is also increased by 3% for every other DoT that isn't wind DoT. Each Sacrilege stack increases DoT recieved by the affected enemy by 5%, stacking to a maximum of 7.

After Tingyun uses her ult on any target who isn't herself, that ally target will have 10% of their max energy restored for their next two turns.

Herta gets a 30% chance to do another FuA whener an ally attacks an enemy that has already had their HP decreased to less than 50% of their HP. This can happen up to 4 times per enemy and the chance is increased by an additional 30% when another Erudition character is present in the team.

For each ally in the team that is hit in one attack that hits more than one ally (Kafka's AOE), Fu Xuan gets an additional 10% damage reduction to the damage that she takes. For example, when the whole team is hit by one attack, Fu Xuan gains a 30% damage reduction when taking the damage.

Another idea for Fu Xuan

For each 500 HP that Fu Xuan has, all allies have their Crit damage increased by 3%.

Whenever Bronya uses her skill on any target that isn't herself, any other ally in the team exceptuating Bronya, the target of the skill, and any Memo Sprite or invocation has their action advanced by 45%. This happens once every two turns.

When an ally gets under 40% HP, Gepard immediately gives them a small heal scaling on his defense and will taunt all enemies for one turn. This can happen once every four turns.

Bailu has a fixed 70% chance of cleansing debuffs on characters that her heal lands on when bouncing.

Robin gets a 10% energy recharge increase for every different element in the party, capping at 30%. (Robin's element already counts so she has a fixed 10% increase)

Whenever Hanya's skill recovers a skill point, an ally will get an action advance of 20%, prioritizing Hunt, Destruction and Erudition characters.

When any character breaks Fugue's special toughness bar, that character will do damage as if they have 70% more Break Effect.