Glad you started too :)
My Luna ended up in a castle with 20 fakes and 25 mana.
But... it's not that important.
After the first three days, I thought, "Okay, it will be easier now," but no.
The real fun is yet to come.
You definitely need to level up Zidar. He can get Armageddon and Explosion in ambushes.
I'm having trouble quickly taking the Tirit castle where Fafnir is.
I tried to ambush him as he leaves, so I can take the castle and defend it from within.
He immediately gets scared.
I think this is one of the key points. After killing Fafnir, you can open the green tent.
I'm curious to see what you'll do.
Added 1 minute ago
I also liked the fire wall. The first time, I messed up and was afraid to go against the Cyclops :(
But then, it was EASY.