Limping AK is never bad if these 2 conditions are certain, which they may be.

1. You will always get 2 or more callers if you raise to 5-6 bb.
2. You will always be able to extract money postflop in a limped pot when you hit your TPTK.

Main reason being with loose opponents the best way to extract money is to hit a hand to value bet 3 streets or jam with. The reason you play ak is to hit a flop, so limping in the above mentioned situation will always extract the maximum value when you hit and ensure you lose the minimum when you dont.

I would personally just raise to make sure we can get stacks in on the flop but it is dependent on the table dynamic and whether they'll call a flop jam with any piece (which can happen in these 25c tourneys). Depending on perceived calling ranges you can also open jam- if villians will call with any PP or A10+ (which can also happen in these 25c tourneys). Basically if raising to 5-6 bb always gets 2 or more callers, it is also likely that villians will call an open jam here with a really wide range.