Had to drop Nepyrim and the Lady Diamond fusions from the Gem Knights list. Nep added too much power and consistency. Replaced with Roses, which fill a similar role without the power.
I've added Tuners to the Psychic list, primarily as an LP-recovery method.
Not settled on what spells/traps each deck will be packing, but I'm at least starting to carve out exactly what power level I want these decks to be at

Seriously thanks for all the explanations of how the game works, it's helped a lot. I still need Ritual- and Xyz-focused decks. I'm scrapping the Pendulum deck entirely for now, that shit's retarded. Looking into options for both, but more ideas are always welcome.