Yeah I had to lower the Difficulty... Anymway, is normal that I grew just one time or I forgot something on the way before the Fox?
Glad I was not the only one who struggled with that battle. Yea, it is possible to get combo-spells by that point in the game. They help a bit and the tutorial about them isn't until a little past that point, so they are easy to miss.
But the biggest piece of advice I would have given myself for that fight is: if you lose your combo, just start the fight over. Avoid all the damage you can, but keep your combo going at all costs. It just makes everything better. Play around and learn the tricks that let you scam the meter to keep a combo going through resets and stuff.