Absolute skills

Firstly, you don't have to attack immediately; you can find a well or, at worst, jump into a Castle. And if it's really a last resort, you can defeat some minor artifact. Not attacking immediately is a waste of time. The week ends, the enemy receives reinforcements, there's no well, and your Castle is far away, so you'll lose a lot of time. Besides, the enemy might attack you without waiting for your recovery. So, all of this is conditional. And having a reserve doesn't hurt.