During the Freya encounter, she summons 3 different waves of adds 2 times. This means you will get each type of add group twice during the encounter. The Storm Lasher, Snaplash and Water Spirit group only has one of each type. This means you will need to have a tank hold the three adds while your group continues to kill the waves. When another group of these adds spawns, you can down both sets. This can be messy as the Water Spirit has a nasty charge that throws group members back. Below are the abilities that each type of add has:

1. Water Spirits - Tidal Wave
2. Storm Lasher - Stormbolt
3. Snaplasher - Hardened Bark

Keep these abilites in mind, because your OT is going to be taking some decent damage. Also, remember that the adds will respawn if you do not kill all three of them close together, so make sure you are aware which ones are tied to each other.