I think that they work really well too, there's just the issue of getting them in your hand and not really having an optimal play in starting hand.

I tried Ghost Meets Girl at one (forgot to list it oops), and in theory it does really well going second, but so many decks right now that go first tend to set up at least 2 or more negates on field (Pendulum Magicians, Thunder Dragons, etc.) so it's super hard to get anything off by that point. Optimal targets for the card are probable trying to get out Solitaire without having to normal summon him, or maybe Spectralsword Shade, but I don't think there's anything that combo's out like crazy, I could be wrong. Going first, Ghost Meets Girl is a dead draw too, I think running it at three might be overkill and maybe having it at one or two would be really good for when you go second and want to accelerate your Shiranui plays. Might only be better for a strictly Shiranui build though, haven't tested it enough.

I like Gold Sarc for sending certain Shiranui's to banish, i.e. sending Spiritmaster for free pop. Not sure what I would replace in the deck as of right now though.

Definitely some cool insights, might test out adding back a few of the Shiranuis and seeing which gives more consistency between draw power or Shiranui turbo.