I just went 26-3 with the version I posted (except -1 gravity tower, +1 burning tower) against the Top50 in the trainer. That's a much better winrate than I've been getting with my current Top50 farmer (pillarless golem), but I'm sure some of that is just the power inherent in having an all-upgraded deck.
Many wins were because the AI is bad (for example, it pisses away point removal like it was its job). If you played this PvP versus red rush decks, I think you'd win at best half the games, even though I went roughly 5-1 versus it today.
I won several games just exploding their land while they stalled. Explosions were awesome, Lances were merely OK.
I didn't face any cockatrice-rush decks and only one rainbow rush deck today, so the gravity shield was 90% useless and could be replaced with just about anything else. But it did get me one LOL-I-deck-you win against a deck with 5 animated Eternity's that I otherwise had no outs against!