I know that's a little stupid to search day and night for an invincible deck which can not exists: any deck playing against itself, there will be a winner and a looser.
But I think at least a deck with 100% win against AI may be possible.
I first tried a deck based on Pulvy / Oty / Gravity shield and Gravity Mark, but it seems I have better results without Oty and changing mark to time.
Here is what I've actually done:
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6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6rn 6rn 6rn 6rn 74a 74a 77f 77f 77i 77i 7aj 7aj 7dq 7dq 7gq 7gq 7gr 7gr 7k6 7k6 7q5 7q5 7q5 7q5 7q5 80h 80h 80h 8ps
The main strategy is to play LD + Momentum + Quint, Octopuss + Quint to neutralize creatures with momentum or too much attack power, the Spin Carapace destroying the others. Pulvy helps destroying any Healing capabilities of the opponent.
It's powerful but not "invincible", any idea what's wrong ?