I fall somewhere between the Medic and the Assassin. Which is kind of how a Bladedancer with Shadowjack and Invisible perks should be played in my opinion. Running the Nightfall this week I played that role often. When Omnigul would scream I would hide on the mezzanine in the entrance and pick off Thralls and the Knights in support but left most of the battle to my two partners using Invisibility to revive them if they got into a jam or to assassinate the Boomer Knights causing problems with my Arc LDR.