...which five?
As I said, if you want an attacker, Charizard is best Modest/Timid with 5IV-Atk (31/x/31/31/31/31, so no Atk IVs).
If you have 5IVs on both parents, and they're differnet IVs, then I think Destiny Knot on one of them will lead to a perfect 6IV relatively quickly, but yeah, still...