In general, it is better to have a few skills at level 10 than to have 8 skills all levelled equally. Select Tripods that increase single target damage ( Single Strike) and increase damage to Challenge or higher types of enemies ( Weak Point Detection).

One for Bosses to focus damage on a Single Target.Select Tripods that increase effect range ( Wide Strike) and increase damage to Minor and Normal types of enemies ( Law of the Jungle).One for AoE (Area of Effect) skills to clear packs Normal Enemies.It’s recommended to use both of your 2 free skillbook slots, choose abilities based on this:

You can swap between saved skill tree slots whenever for free (even in combat as long as no skills are on cooldown). However, if you just want to speed up the process (maybe that’s the most fun for you) or you’re tying to power through leveling an alt, follow this breakdown of what skills to use and level up and which tripods to activate. As with all of the classes in Lost Ark, we recommend that you try out all the skills and play whatever is the most fun for you.

Diablo 2 sorceress leveling guide