


Wasteland explorers are being trained across all stats. As my vault improves I'll have an excess of workers, so I'll try to train everyone in endurance and possibly strength/perception. Personally, I'm training the primary stat and luck for my stay-at-home dwellers, though I'm phasing out diners/gardens and water production as I introduce more Nuka Cola bottlers. In the wastes, success against a specific enemy type seems to be influenced by a specific stat (excluding endurance which seems to be a purely defensive stat). Strength may increase damage (though it's not certain this applies within the vault) and perception may increase aim/hit rate and thus overall damage.

Higher Perception levels make the indicator move more slowly. Perception In a Quest: Affects the speed of the critical hit indicator. Increases the chances of opening lockers which will result in more loot (check your dweller’s exploration journal). (see this question and the links within the answer). Increases the amount of loot the dweller can carry. However, there is some thought that some of the SPECIAL stats affect combat. The only difference based on level is the dweller's total hit points, and the cost to revive them. Agility and intelligence are probably a waste of time for dwellers who won't be exploring the wastes.
