Man, GMX has some real slot machine combo routing, but the biggest problem is Noma. Her on field effect is absolutely insane, especially since she can summon a 4-5 dino COMPREX with ease, but pure GMX genuinely has no way to summon her with any consistency. The only answer I could come up with was sending her to grave with Mitsurugi Ritual, then reviving her off whatever loose revive is left. So you've got ALLOS, Kimridge stack > VELOX, Cross Sheep, Charmer Quartet, and Selandea to somehow get her onto the field.
GMX bridges into Mitsurugi with Archosaur (pop ALLOS/VELOX), and Mitsurugi bridges into GMX with Zombie Vampire. 12 GMX-sided starters, 4 Mitsurugi-sided ones, so consistency's actually ok, but sadly there's only enough space for 12 non-engine. Could maybe argue for cutting the GMX Trap, quickplay, or both - the routing frequently won't let you search either of them.