Ability scores

Dexterity is the main combat ability. Wisdom is a strong secondary choice because Survival and Perception suit the archetype naturally. Constitution remains useful for durability.

Weapons and Sneak Attack

Ranged weapons fit the Scout naturally because Skirmisher helps create distance when enemies close in, but a finesse melee build still works. The important part is maintaining a dependable qualifying weapon attack while using mobility to control engagement distance.

Action economy

Stay difficult to pin down. Use Skirmisher to preserve distance when enemies approach, then use Cunning Action and the Rogue's normal movement on your own turn to choose a better firing or flanking position. At high levels, exploit Ambush Master by hitting a priority enemy early.

Skills and Expertise

Survivalist already gives Nature and Survival proficiency with doubled proficiency bonus, so Expertise can be spent on other priorities such as Perception, Stealth, or thieves' tools instead of duplicating what the subclass already does exceptionally well.

Common mistake

The common mistake is using Skirmisher automatically whenever it triggers. It spends the reaction, so moving away may cost access to Uncanny Dodge or an opportunity attack. The best use is the one that materially improves safety or the next turn's positioning.