And theres Swarmyard MassacreSwarmyard Massacre, a five-mana sorcery that gives us two Squirrel tokens and then gives all creatures that arent Squirrels, Rats, Insects, and Spiders -1/-1 for each Squirrel, Rat, Insect, and Spider we control
This ability goes very well with cards that count quantity of auras and equipment (Kemba, Kha Regent, or All That Glitters)
At the same time, by focusing more on the middle ground, Ruby/Amethyst doesnt fair quite as well in the late game as, for example, Ruby/Sapphire that has access to tons of powerful card removal characters and insane lore gaining capabilities
Worst case is that its a gamble and a fast way to lose