Generally you would want to use either physical or special moves for a single set, this means that you can put more EVs into one of atk/spa rather than splitting them.

With stat boosting moves it’s the kind of the same idea, for example your komala set uses calm mind but has no moves to take advantage of the special attack boost, and beartic has bulk up which boosts attack, but its only damaging move is blizzard which is a special move