One more questionable situation is MP vs CO,BTN 3bet. Pokerstrategy advise to 4bet bluff AQo,AJs,AJo,KQo.
AQo, KQo have a good blocking effect, AJs has good playability OOP.
But what about AJo? It doesn't have a good blocking effect (blocks many bluffs Jx) So maybe better to choose A5s,A4s,A3s as a 4bet bluff? They have not bad playability OOP and also maybe even have a better blocking effect?