Ok let’s say I raised x4 and get three callers.
If 3 people have limped into the pot, isolating to 4BB is still way to small. The goal when isolating limpers is to get value and also to thin the field and ideally get it down to a heads-up situation against one or at most two of the limpers or perhaps someone from the blinds. In a game with loose calling stations you can go as large as 10BB and basically pretend, you are 3-betting rather than raising over limps.
The limping in with AA was just a contrived example…. Just tell me what yo do if I raise 4x and get three callers in position.I never limp with AA…
It depends on the board runout. Connected boards are much more dangerous than disconnected boards, and paired boards are also not great, especially not when they are paired with a high card, or if the top card from the flop pair on the turn or river. Presumably you are talking about a situation, where AA is an overpair, but AA will also sometimes improve to top set or pick up the nut flushdraw. So there is more to playing a hand then just "LOL I have aces".
It also matter, how many people continue on the flop, and who continue. A call from the player first to act or an overcall is stronger than a call from the last player, when the two other players have folded. This is an important dynamic in multiway pots. Your question is very broad, and its much better to post an actual hand history in the hand analysis section and get feedback that way.