Posted in another thread. The change to dissipaton, creating a fairy swap that interacts with fey union, which has different effects with either fairy would enhance synergy extremely. Eos stays her powerful aoe support self and selene becomes more single target. Selene would not increase damage, because if she did, DPS would expect it over the tank at all times and Eos would never be used for fey union. Shortened list to what i feel would have the most impact.
Dissipation: Orders your pet away while granting you a full Aetherflow stack.
Also grants a buff that increases healing magic potency by 20%. Your next Summon or Summon II is instant cast. Buff ends after 30 seconds or when your next Summon or Summon II is cast. Aetherflow spent while in dissipation will fill fairy gauge at a rate of 20 instead of 10. Using aetherflow outside of a fairy summoned or dissipation will have no effect on the gage.
Fey Union:
When active with Eos All party members within 10 yalms receive 200 potency in healing every 3 seconds . A buff is placed on all members within range increasing spell based healing potency by 10%, which ends as fey union does. Fey union remains unaffected as an ability.
While Selene is active 350 potency every 3 seconds to a single target within 15 yalms. A buff is placed on that party member reducing damage taken by 10%.
Fairys:
Eos:
Fey illumination returned to 20%.
Selene: Fey Charm-Silent Dusk no longer applies Silence, instead it places an 8 second magic vulnerability down on a single target and is called Fey Charm. Cool down of 90 seconds.
Fey wind buffed to 5% speed increase.
Bane: Also spreads Chain Strategum. 15% chance to reset its duration on the mobs hit.
Role Skill Change:
Break: cast time 2 seconds. Recast 2.5. MP cost equal to 1.33x Broil II. Deals unaspected damage with a potency of 65-80 to target and all nearby targets.
Additional Effect: Heavy +20%
Duration: 15s
Imagine having Selene out, to increase dps of the raid. Large AoE is coming. Dissipation! Burn Aetherflow. Energy Drain. Energy Drain. Adlo spread. Sacred Soil. 60 gauge filled. Instant Summon Eos. Dissipation falls off. Massive AoE about to hit. Fey union Eos to make her a pulsing 200 potency heal, while increasing the healing potency of your coheal. You used multiple cool downs together to create a powerful effect.
Does that not just scream tactician? Scholar?