[greenroom1]

I like raising with AQs in MP. Especially with 2-3 limpers in front. 5-6 handed is very difficult to play and very easy to lose. If the flop comes A X X rainbow. I don't feel as strong with a Q kicker against two pair, openeded draws, back door flushes, and random sets. I want this down to 2-3 players preflop and I want the large stack to fold. He is the only unknown. I think the play here is to reraise to 200. Without any reads I would plan on calling any all in bet except the big stack. This should make Axs and Ax fold. AK-A10s, KQs, 55s or higher would be the likely hands your were facing 3 handed. Very unlikely to be facing another diamond draw at this point. You also get the advantage that if all the late position players fold you will have position on the blinds and the early position limpers if they call. The A or Q now serve as suitable outs to any paired undercard. I think it is safer and more positive in EV played this way.

post flop: call the all in unless the big stack made the raise.