Lumbering Battlement leaves the battlefield, causing Restoration Angel to return to the battlefield.
Restoration Angel and Lumbering Battlement enter the battlefield, triggering Restoration Angel's ability, Lumbering Battlement's ability, and Deadeye Navigator's ability twice.
Resolve both Deadeye Navigator triggers, choosing not to pair.
Resolve the Lumbering Battlement trigger, exiling Restoration Angel until Lumbering Battlement leaves the battlefield.
Resolve the Restoration Angel trigger, blinking Lumbering Battlement.