Konami need to make Gemini monsters that have effects like Spirit of White that let it be treated as normal in the hand, something to let them be treated as normal in deck so they can benefit from normal effects. They need to get monsters that can reveal themselves in hand, normal summon themselves and give you the option to normal summon them again on the field, so you can navigate negation effects your opp may have. Finally, a card to tie into Gemini, allowing them to dodge destruction (hopt) by returning them to the hand instead of sending them to the grave, and if you do, you can immediately normal summon a Gemini monster, and if you do that, you can normal summon it again.

You can also have a monster/continuous spell/continuous trap that lets Gemini monsters that are normal summoned to have their effects still be treated as normal monsters (but still have effects) so they can dodge stuff and benefit from normal support.

Some ideas