Inquiry: How to increase total power

Aren't you supposed to go train the wizard? It's been too long, I kinda forgot.

When you promote to an advanced wizard, there will be 6 in the first zone. Promoting the last one is enough to enter the second zone.

The fruit can be raised to level 5, so remember to grab it. You need the fruit to raise the level cap.

The strongest are definitely the Fire Mage (Winter Castle) and Dragon Knight Mage (Sky Castle). If you save resources precisely you can enjoy it as a single-player experience, and if you play slowly, you'll eventually reach it without spending money. Azkaban won't be opened anymore because the immense power of the Fire Mage and Dragon Knight Mage cannot be reasonably justified.

I've also entered the Water Country.