Eonar just wants to be left alone, but all these rude guys just want to get up in her grill. It’s your job to slap them away.
To be honest there are TONS of ways to do this boss, and 90% of the time you simply need to stick to your assigned group and traverse through the fight as mobs spawn around the zone.
As a healer you will almost always be assigned to handling one of the Paraxis groups, and you will also likely pick up the yellow debuff. This debuff will cause damage to you for any movement you make, and stacks the more you move. Simply just try to remain stationary as much as possible to reduce the impact of this ability while you continue to handle your group assignments.