The big threat that comes from Galilea is her ability to dish out enormous amounts of CC and still be capable of good tanking and good DPS. This mostly comes from her skill Desecrate.
I was thinking that the three majors issue are:
It’s Dangerous to Go Alone’s ability to stack with melee damage.
Desecrate’s long duration and damage amplification.
The Vortex mutation at level one (pull with Desecrate).
To fix IDTGA: At full health, rather doing her primary melee combo, she uses an alternate animation to attack which shoots out ranged energy bolts. This new attack is NOT a melee attack, it is a ranged attack that is only available at full health.
To fix Desecrate’s damage amp: Desecrate is no longer an AoE that stays in place but a damaging blast that centers on Galilea which immediately disappears after it is used (Think Wrath of the Gods from Dark Souls). She keeps all of the effects that Desecrate would normally have, but instead it does a burst of damage in an AoE upon activation.
To fix Vortex: Vortex is no longer a pull, but instead it is a push. Problem solved.