I just built a Senators/Twins team using the leftover years 1912, 1933, 1945, 1992, 2006 and the stats compare favorably with my A's team.
Senators/Twins: Hitting: .318 / .382 / .455, Pitching: 1686 ip, .223 oav, 1.05 whip, 0.32 hr/9
A's: Hitting: .312 / .384 / .482, Pitching: 1563 ip, .231 oav, 1.08 whip, 0.40 hr/9
Of course, I understand that if a third owner joined the Senators/Twins drafting group, by definition, all the A's teams improve incrementally.