Hey!
Against many limpers in the early phase, just raise to 6-7 BBs. Situations that can happen:
-- you hit the flop. in this case, just go broke.
-- you miss the flop against
----- one opponent. In this case, I'd suggest cbetting halfpotish a vast majority of the times. I wouldn't cbet something like 9TJ suited, so only the ugliest of boards. If he doesn't give up, you give up unless you hit on a later street.
----- more opponents. In this case, you don't cbet, you give up.
----- two opponents on a really dry board. If you have position and they both check to you, you can try a halfpot cbet, but only on dry boards. Paired boards are perfect for this, such as 883.
Of course there is much much more to playing AK but these simple rules should help you play them confidently in the micro and lowstakes 
As for higher blind levels: in my opinion, you can always put in your money with AK if there is at least 12-15% of your stack already in the pot (including SB and BB and limpers). For example, if you are on 50/100, and have 2000 chips, then if there is a limper you can safely shove over him (250/2000 - 12,5%).
Of course from a stack as big as this, I'd prefer raising to 3x if I had position. As the number of limpers grow (so the pot becomes bigger, and also the chance of a multiway pot postflop) I'm more inclined to shove. For 15 big blinds, I'd always shove AK over a limper if I were you. Over 4-5 limpers, you can even shove 30 big blinds.
Hope I could help, good luck at the tables!