Islands of Secrets

I've been playing all night and can't stop. Can you tell me how to beat "Peak of Stars"? I keep getting wiped out on the second week when playing as a Warrior. They don't just attack from one front; they take out Ingvar (a dark elf) and Geralt. With Geralt, it's clear – he's not fully leveled up yet, but he's level 20. Gnomes keep coming one after another with armies six times larger than mine, and they just keep attacking... I don't have any troops, and the Elven Archers can't get everywhere in time... How do I beat it? I've already started five times, and I have Aeron's super ability and Linna's ability maxed out. It's tough; help!