3. Use projectile powers like Warp, Incinerate, etc., to make them freeze in place, and then shoot them. Singularity is probably the best, because once you drop their barriers, the Singularity will pick them up and you can hit them with another biotic power for an explosion and easy kill.
Once bubbled, dont go for the head except if U have 2 m or penetration or more. In fact, if U dont have 2 m or penetration or more, u should t make her bubble except if U have a very high burst damage weapon and U want to make her freeze
4. Use Stasis or Submission Net on them.
Submission net wont wk if U R more than around 5 m away
8. Use grenades on them, but make sure you aren't "targeting" the Phantom when you are throwing them. Either target a different enemy, or just throw the grenades at the ground or into a corner. If you are targeting the Phantom, the grenade will have no effect.
Start the grenade throw animation away from the phantom, then come back to drop them on her
Well, u could search fot Sthikam video in the library (how to deal with boss)