The highest penalty-free match at the MAR Championship was 283, put up in match 2 by 25, 56, and 193.
http://youtu.be/PpwvllKZYzc
Deducting foul points, the next highest score at the event was 244 (294 with fouls) put up by 25, 225, and 708 in match 104:
http://youtu.be/pUxbG5EwO0w
Both matches each only had a single high goal scored in teleop and the latter only had a single truss score.