like in real life teams must open defenders to create and score goals, try changing players roles on attack
for instant - roles that open defence would probably be deep lying forward - shadow striker - inside forwards, have these in a 4-2-3-1 could open the opposition defence and may get you goals.
with my Newcastle iv'e created a 4-3-3 and i get about 3-4 goals a game and i'm using a deep lying forward on attack, 2 inside forwards with 1 on attack and the other on support