How would you Balance Mercy... (Read OP before posting!)

For those that want to see my own ideas on this, well here you are:

Caduceus Staff:

  • Healing increased to 55 HP/S

Rez:

  • Cast time becomes 1.5 seconds (down from 1.75 seconds)

Valkyrie:

  • Ultimate Cost increased by 10%
  • Chain Healing:
    • Main target gets healed for 80 HP/S
    • Allies affected by chain get healed for 50 HP/S (the same amount it is right now)
  • Chain Damage Boost:
    • Main target gets 40% Damage Boost (up from 30%)
    • Allies affected by chain get 25% Damage Boost (down from 30%)

If this proves to be too much, then here’s something that can offset it:
Valkyrie

  • Duration reduced to 12 Seconds (down from 15)