I'm not going to vote because the poll doesn't accurately reflect game settings or type of game. "MP" has a ton of definable conditions not only for nations/setting/win scenarios/#ofplayers but for certain nations.

If I had to make a broad statement, I'd say that in MP if you use a Rainbow pretender you have to be survive the early-mid game to actually use them when they provide an advantage (late game). And if the settings or the players is counterproductive to you sitting behind diplomacy or indeps, your chances are slim.