I'll be honest, Gladiator Beasts are all pretty terrible. Forbidden Droplet/ Dark Ruler No More should help with that. Creature and Backrow destruction will also be helpful. But don't expect to win a lot of games.
This is a Go Second deck. If you're in the position you must go first, hope for a great hand. Fusion Deployment and Fusion Armament are the best you have. Test Tiger and Test Panther can help as well.
Most of the Extra Deck gladiator beasts in this deck aren't meant to be summoned from their normal summoning requirements, except Gladiator Beast Tamer Editor, Andabata, Test Panther, and Dragases.
The goal of this deck is to get out Gladiator Beast Tamer Editor as soon as possible and then use it to summon Gladiator Beast Domitianus, Gladiator Beast Heraklinos and/or Gladiator Beast Gyzarus. If you're lucky ideally you want at least Heraklinos and Domitianus on the field when you end the turn.
There are a couple ways to do this. Gladiator Rejection is the MVP of this deck. Gladiator Rejection with Unexpected Dai, Rescue Rabbit, and Fusion Deployment gets you a bonus Gladiator Beast from your deck. Depending on what you have in hand you could grab Augustus and just go into Andabata if you can get away with attacking with it to get two more Gladiator Beast from the deck (Augustus and Vespasius).
Optimal open for this deck is having at least one rank 5+ gladiator beast in hand, Gladiator Rejection and some cards that gives you a special summon (Unexpected Dai, Fusion Deployment, Test Tiger, Fusion Armament [and Forbidden Droplet], etc). And a normal summon (Rescue Rabbit or a rank 4 or lower Gladiator Beast).
Note One: Before battle phase, Gyzarus is best to summon to blow up two cards on the field. Attack and then make Tamer Editor in Main Phase two.
Note Two: Vespasius Special Summons itself on an attack and increases all monsters by 500 ATK.
Ash Blossom & Joyous Spring destroys this deck. A Gladiator Beast still shuffles into your deck but doesnt summon a new Gladiator Beast.
Have Fun :)