I'd expected Generation 722 to go a lot more quickly than it did. The big heart on the chest was virtually untouched so I thought I'd see how robust it was. It took half a dozen times inflicting close to the damage each time before it was destroyed. After it was destroyed, the servers synched and the heart reappeared. It took two more sessions to destroy it for good.
The below video was an encounter . Around the 3:30 mark, Nei grapples the lower left rear leg and slashes with 100 kisses. Although the event cannot be seen in the video, it is apparent from the mini-map. After the 3:30 mark, Ur-D on the minimap is defined by the Arisen's white triangle on the chest and Nei's red triangle on the rear left leg. This combination is very effective. At about the 9:00 min mark, I switch from 100 Kisses to a regular light attack in order to reduce the damage Leila inflicts and stay under the cap:
The heart is destroyed. It occurs at the end of the session. Frankly, I wasn't expecting it. When Ur-D reared, I misinterpreted it to be his retreat and instant reset out of the grapple. It took a few seconds to reorient myself, at which time, he did depart:
Fortunately, I had an opportunity to atone for my initial sloppiness. When the servers synched, the health jumped up to the 6.2 mark and the chest heart reappeared. It took two sessions to destroy the heart. The below video documents the second session.
The following video shows the prevention of Ur-D's departure. I make an exception to not opening menus and open menus twice once for 17 sec the second for 8 sec for a total of 25 sec. Ur-D is announced at the 12 sec mark and departs at the 23 min mark. That means the fight lasted 22 min and 23 sec. This is the longest fight I have had and is more than double the standard encounter. Needless to say, the damage cap was exceeded and the server is not contacted after the fight:
As Ur-D loses health, more hearts become exposed. Although Nei is a Ranger here, my hypothesis is the exposed hearts encourage her to climb. In the below video, she attacks Ur-D's right heel while Leila attacks the right shoulder:
High stagger tactics frequently result in fights that last longer than the normal 10 min session. In these instances, the damage cap could be exceeded. To ensure the session counts, disembark by jumping off or using Instant Reset as in he below video: