Comments of chapter undefined of Demonic Dragon Reincarnation: I am contracted by a sexy lord

I don’t get why he keeps trying to upgrade that skill, when he doesn’t even fight himself. Shouldnt he be evolving the skill that merges his troops, since most of the time they are doing the work. Even if he levels up, all his fighting skills are level 1. Don’t even understand why, he is passive half the time. If he wants exp, he can kill the monsters and at the same time level up his other skills, which are more important for surviving. Sleeping all the time, and being unable to level up without reaching core 3 is just pointless.