Playing Big Slick early

[Hawkeye27]

How are you playing AK early in tourneys? I've had several situations lately in the $20 and $30's where in the first two rounds AK gets all-in against AA, KK, or QQ. Fortunately, I've had the pairs most the time. When I started out in the $10's there were so many people willing to get AI with AQ-Ax thats it seemed getting in with AK was +EV, but I don't see much of that at these levels. Here are a few situations I'm wondering about:

EP min-raises, Hero ups it to 4-5x BB, folded to EP who reraises AI. Call or fold?

EP raises to 3-4 BB folded to Hero in LP. Raise or call? I've been doubling EP's raise amount. What if he comes over the top AI?

Or Hero raises 3-4x BB in EP and someone doubles your raise or raises AI.

Obviously if you have a read that the villian has been raising loosely calling these AI raises would be easier, but in the first 2 rounds you probably won't have that luxury.