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You're able to build pretty great decks using mostly RoJ cards. Not exactly so with CoW.
I personally think The Second Coming > Three WoesThree Woes > Broken CovenantBroken Covenant > Michael Michael > Red DragonRed Dragon > Eternal Inheritance My overall UR rankings from the last 2 sets1. TSC (Power, Playability, Versatility 1)2. 3W (Power, Playability, Versatility 2)3. Broken Covenant (Power 5, Playability 3, Versatility 3)4. Michael (Power 4, Playability 4, Versatility 5)5. Red Dragon (Power 6, Playability 5, Versaility 4)6. Eternal Inheritance (Power 3, Playability 6, Versatility 6)
Maybe this is a difference between T1 and T2, but I'm not convinced Second Coming is better than 3 Woes, although I admit, I'm not entirely sure what 3 Woes will do to the T2 landscape just yet. But Second Coming is almost always a rescue (usually the best use of it will be to recur Son of God for a second use, but it has the added benefit of being used effectively in other situations that probably make up for it's weakness to Hezekiah's Signet Ring and banishing Son of God from discard pile (that's also somewhat mitigated by Covenant of Prayer))Three Woes has the ability to disrupt your opponent's strategy long term, on either offense or defense, which could be more valuable than an extra rescue.But these are just my thoughts on the cards.My advice for a box to get? Probably Revelation of John. I'm not convinced it's better than Cloud of Witnesses, but it gives you access to reserve accessing cards and what I think is the best Multicolored site in the game, also there are likely less Revelation of John cards available so it may have a trading advantage vs Cloud.