p1: Sap hunter, attack when flare fades (sap pet first), try to live as hunter tools on you.
Vanish, begin p2. This is the most dangerous phase by a long shot.
p2: Attempt to wait out the hunter, hearing is increasingly annoyed voice on vent. Enter a few squirmishes, but for the most part stay in stealth. This is by far the longest phase.
p3: When the hunter gets a party member to show where you are, mount and taunt the hunter from the air. The hunter will fly up and shoot at you, taking fall damage considerably more than the damage you took. At this point dismount, go into stealth, and SS->kill the hunter. This is easily the funnest phase.
(seriously though, that did happen last night)