Tell me if this setup is stable.

I've tried this setup — lacks power. Essentially, the best result came from the following arrangement: 4g - 1m - Marksmen - 1m - Angel - Pikemen - Angel.

In round 1, the Angels fly to the Grendel stack but don't hit it. The Grendel stack flies out of the corner and hits the Griffin stack, killing it (you can take more [Griffins], then it won't kill them). The Marksmen retreat to the corner, the single-unit Marksmen surround the Pikemen, the top-left Griffin stack kills one single unit, the Pikemen retreat to the corner in full force.

Then the hassle begins — you need the Griffins to attack correctly, you need to reduce with the Marksmen exactly those stacks that are about to strike, and finally, you need the Griffins not to take too much damage.

Overall, out of 3 attempts, it worked once. In a real game, I certainly wouldn't go into the Griffin Conservatory with such a setup.