
I took out PSY, Gadarla, and light/dark cards and added Akyls x3, Militum x2, and Dragonunity Glow x2. Is mine still viable?

The issue with Aklys and militum is that they don't do anything on their own, you need to have advantage already for they to work and if they get negated it ends your turn. The deck was created thinking in going second which is why it has the kaijus also are bridges for small world, and the psy frame gives you a lot of advantage negating Maxx C or Ash during your turn, I wouldn't remove it even going first. If you want to change the deck for going first I would recommend other extenders, like Odd-eyes revolution dragon, garuda the wind spirit, or darkwurm adding luin in the extra, also you could add Hope Harbinger and Ultimaya Tzolkin for your endboard, but in my expirience, the going first deck in the limited format is way weaker than other decks like swordsoul or Virtual world.