I personally tighten up my range against limpers, I raise draw heavy
hands with a big raise and I raise smaller with premium hands hoping to get the OL to call, but that depends on how many people are going to call my raise, if its just the open limper, then the above is what I would normally go for.
If too many people call raises after cold calling I will more than likely not raise with AK especially OOP, I would raise bigger with my premium hands to narrow the field, it all depends on position and what reads I have