I think mostly I'm ch-r my monster hands and big draws, and then bluffing in spots where my opponent has a high fold cbet to ch-r % and the board cooperates. It's the main way I balance my cold calling range postflop. Otherwise I'm donking with similar hands (monsters, draws, bluffs).
There are plenty of spots to call oop. ex: If your opponent is a lag, you have KJ and his 4bet % is huge. Call, flop a pair, let him barrel. Or, call, miss your pair, c/r bluff or some other bluffy line.