Maintenance for the week of April 22:
• PC/Mac: NA and EU megaservers for patch maintenance – April 22, 4:00AM EDT (08:00 UTC) - 9:00AM EDT (13:00 UTC)
• Xbox: NA and EU megaservers for patch maintenance – April 24, 6:00AM EDT (10:00 UTC) - 12:00PM EDT (16:00 UTC)
• PlayStation®: NA and EU megaservers for patch maintenance – April 24, 6:00AM EDT (10:00 UTC) - 12:00PM EDT (16:00 UTC)
Never tested if it can proc damage sets, however, the damage they take from you, regardless of the type of damage you take, will always be physical. When I get time I want to test this though, add it to my list of stupid mechanics of guard, got a thread about the many weird things about guard.