Sneaking: This is optional, from the non-combat skill category.Leveling it also increases your Fire-based damage by 5%.
The higher it is, the more advanced Pyrokinetic skills you can learn. RELATED: How To Find Every Companion In Divinity: Original Sin 2 Every level also increases high ground damage bonus by 5%. The higher it is, the more advanced Huntsman skills you can learn. Every level ups your Ranged damage by 5% and Critical Chance by 1%.
As you level up, you'll unlock ability points, too, which should be divided in the following abilities. However, Pyrokinetic is a decent choice and is the default option in the game. The game's ability system is very flexible, so technically you can pick any school of ability to complement your Huntsman skills.