>>17878449Well, if the other parent you're using is a Safari mon, then two of their stats will already be perfect.
Assuming you want three other stats, there's a 1/2 chance that each of those will be passed from the ditto, so that's 1/8 chance of a flawless (assuming the undesired stat isn't passed down, so I guess it's actually 1/48), but those chances are doubled for every extra perfect IV your non-ditto parent has... so it won't take very long, anyway.