Are any of the current supers "worth it"?

Haven't managed to get any of the 5 currently available Super Personality digimon yet. not sure if I want to sink anymore rubies into trying to summon them. are any of the current ones actually any good? (Wargrey, MetalGaruru, Gaiou, Phoenix, Vike) or am I better off holding onto my rubies for a future banner? is there a particular future banner/ digimon I should be keeping an eye out for?