Which pool could give me the best return bitparking merged mining or Multipool?

[thehulkk]

I'm asking this because is hard to calculate future profits.  If I mine in bitparking I can trade all merged coins for bitcoins in the market, well except for groupcoins, can't find a market for it.  Multipool doesn't have merged mining, but it always mines the most profitable sha256 coin.  Anyone that mines in these pools can give me an opinion about which one could give me the best profit?