I probably call more often than 4bet. Against a very tight 3bet range I might even fold OOP.

If I 4bet, I think I make it either 12 or just shove. Getting more than 1/3 of your stack in basically commits you anyway, I like to just shove it in then.
If villain folds his AK to it, great. If not, fine as well. It takes away our positional disadvantage which is important here, imo.