I’m part of the judge staff at Dragon*Con this year, and I might be called upon to play a bye round in the event of uneven pairings.
Here’s what I’d play in the 400-point “Dragon of Dragon*Con” tournament:
Black Rider 100
One of the Nine 100
Ringwraith 100
Servant of Sauron 100
= 400 points, plus the “dragon” Sauron himself!