United We Stand works really well actually with Odd-Eyes Pendulum Dragon. It can one shot an opponent with enough cards on field and one open to attack. 6500 with 5 monsters doubles when he hits an opponent to 13000 atk. As for the fusions Vortex helps out often enough when I don't have Mist Valley Apex Avian on field. It may be cloggy as you say. I may swap one of the Odd-Eyes Fusion cards out for a Terraforming and a Vortex for Mecha maybe. Forgot to update my picture. There's some cards I've changed.

cut 1 pendulum call and 2 odd eyes fusion and united we stand, thos are cloggy cards in a pendulum deck , mak it more pure like i said 90% pendulum