We defended against all rushes, and in the end, he didn't surrender the fountain, but he did have a Necropolis and a clear view. With the Gate of Oblivion, he was sending Firebirds through the portal. We quickly leveled up a Necromancer and started attacking with him. We found a level 2 Consul, and with that Gate of Oblivion (and Efreeti on the other side), the only question was time. The opponent didn't try to stall.
Thanks for the game!