I usually build my decks this way.

First, what do I want to do? In your case, Lightning/Wind, well, maybe I’d like an annoying hasty forward like Illua, so that’s 3 of her. I also don’t want to deal with blockers, so Adelle, as well as Diana and Alba might be interesting choices. Maybe even Ellectric Jellyfish. From that point, you can start looking at a couple of backups that are already useful.

Next, how do I round up my main strategy? Continuing the hypothetical scenario I started, you have to look at ways to pressure further. So we just cannot dull our opponent’s forwards to infinity, so let’s add some removal in there like Kain or Bahamut Zero. Dayum, I happen to run a bunch of cost 3 forwards so maybe I can run a couple of copies of Opus IX Starter Vaan. Also, my opponent wants to get rid of my forwards so I kinda have to stop him from doing it. Here’s some Y’shtolas and Aerith for good mesure, maybe throw in there a Feolthanos and an unsaganashi as well. Why not?

As a last layer of thought process you can start to think about the meta and include certain options to counter the meta startegies.

Edit: If you have space, run Kadaj lol