In Bughouse, players often target the f2/f7 square; it is common to see a minor sack on f7, followed by a knight on g5 delivering check and breaching through the opponent's defenses.
I recently played a Lichess Bughouse game where, even though the opponent castled, the f7 square still offered opportunity.
Personally I think I'm still novice with bughouse, so I'm wondering if just attacking the f2/f7 square is a good rule of thumb. Or, is there is some better general advice for beginner or intermediate players to follow?