Maintenance for the week of October 7:
• PC/Mac: No maintenance – October 7
• Xbox: EU megaserver for maintenance – October 9, 2:00 UTC (October 8, 10:00PM EDT) - 16:00 UTC (12:00PM EDT)
Very little and only while the effect is active. It is not an effective self-heal; more of a slight damage mitigation. At least it does decent damage as long as you are not fighting skells or ghosts.