J C Lawrence
Mr Brown is useful in the beginning, but later in the game he's no good.
Try using Mr Brown more aggressively, not just to get the museum placements you need, but to take the museum rooms that other's need. Just fill the museum as fast as you can, spending as many cubes as you can as fast as you can. You might be surprised how useful Mr Brown really is.
Ms. "Start w/ 2" and Mr. "Expand w/ 3" should be consolidated into a single piece, perhaps another dual role (or simply get rid of one of those abilities). You end up blowing through your cubes too quickly with them.
Then use them more judiciously. They're both used more as threats than as exercised abilities.