Red can easily generate mana advantage as well, be it through bursty rituals (Irencrag Feat), treasure tokens (Dockside Extortionist), free spell/polymorph effects (Fires of Invention, Tibalts Trickery), or the occasional outright mana dork/discounter/mana multiplier (Leyline Tyrant, Mana Echoes)
But the graveyard need not spell the end for your artifacts
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Cutting a Ritual out of their deck can certainly make life harder for them, but its hardly an insurmountable problem
The best subtheme "plans" to have are, roughly in order: Crapload of spells, good card velocity (aka card draw), and Gandalf's Sanction (best) or Fiery Inscription (second best) 1 power tempt tribal
This setting is possibly the closest thing to a Pokmon journey that can possibly be replicated in real life