In the case of P. Sweeps, it's all damage dealt by that skill. MagPlar survivability scales upward with number of enemies you can damage--until you get CC'd.
On my PvE MagPlar I run Cyrodiil's Light, War Maiden, and Grothdarr. It's really strong for solo play and normal/vet dungeons. Haven't tested it in trials, but for that I probably would swap out Cyro's for Julianos, Mother's Sorrow, or Soulshine.