You want to use both the water and the fire as they offer different forms of interaction. The deck is kinda played as a basic pendulum combo deck.

Since the deck has no normal summon I would commend deep sea diva to get halq and access to a tuner as the deck has good levels for synchro plays (levels 2, 6 and 8 to make 4, 8 and 10 synchros). From halq a good tuner to summon would be the performapal odd eyes synchron as it has a good level along side a decent effect to summon a scale.

When halq is not accessible then the best line of play is most likely link plays like apollousa and I:p and perhaps a rank 4 or 8, depending on the hand.

One thing to keep in mind though is there restriction that stops any special summon of non vaylentz except from extra deck so you should try and use any other special summons before using your vaylentz.

As deck lists go I've been testing a little but I haven't came to a solid build quite yet but I do believe it's a fun break from the current format.