Depends on position. UTG 3xBB, other positions 3xBB plus 1 BB for each limper. This way it eliminates some players, as you want to have as few as opponents as possible to take away the chance that a donk will try to crack your Aces. Post flop, 1/2 to 2/3 of the pot to either take it down, or eliminate any other players that may try to donk you. Watch for players playing back at you unless you draw the nuts. Be careful, watch for straight, flush or FH draws if you manage to trip up. It will be hard to throw away pocket aces, especially if you hit an ace on the board.