I think if SoGs were made Life cards (as Zanzarino was thinking to do) and a system like majofa suggested would exist, everything would be more balanced and work better.
If you had 3-4-5 elements to make your deck from (by oracle spin), then not everyone would use the same decks over and over again by just adding the 5 oracle cards in it and not many 12 SoGs 12 Sanctuaries decks would exist.
SoGs = Life cards? Life already has enough healing, as well as the only other card with the ability regenerate. SoGs would make Life one of the most overpowered elements in the game.
In other news, good mono arena decks
can be made. For instance, I got an Amber Nymph from the Oracle, so I threw together a mono gravity deck (have fun fighting it
).
And if Platinum is made up mostly of the same rainbow decks, then shouldn't making a counter be easy? If we could all use an effective counter, it would discourage players from putting up rainbows.