Try to play attacking formations (don't play 4-3-3 no one on wings, play 3W-4-3 wide diamond) at away matches. High pressing and normal tackling. Even if you get a 2-2 you'll be lucky. Play a defensive formation (say 5-2mc-2W-1 or 4-5-1V) at home. 1-0 is good, if you concede anything more than 2 goals (if first leg is at home) then play 5-3-2 at away.
I got 2-2(a) and 0-1(h) last season, that goal came to a penalty... So never use hard tackling in cup games.