1.Nf3 is a bad move in bughouse. Nf3 intending Ng5 Nxf7 is not good because this idea can be easily refuted.

Nf3 e6 Ng5 Qf6 Nxf7 Qxf7 Place knight on g6 Qe7 Place pawn on f7 Kd8 and black king is surprisingly safe.

There are many other good options for White such as 1.e4.