This Deck works pretty fine, however, they should release that LV7 X-Saber Synchro. Urbellum is the worst Synchro of X-Sabers.
However, if you want to mix the X-Sabers with someone, you should add Naturias, especially plants, then use X-Saber Beasts. Naturia Pineapple would always come back, and you summon a LV3 X-Saber Tuner (yeah, Airbellum) -> Naturia Beast. Or just summon a Naturia Tuner Plant (which is really common), and you summon a Darksoul. But you can also ignore the Pineapple and use Naturias to help Summoning of Naturia Synchros OR Naturia Bambooshoot.