Potency, and Critical Hits

[Bixby]

Potency is mostly a means of figuring out the relative power of skills. For the record, 100 potency is the damage your auto-attack does. So if your auto-attack does 50 damage, a 150 potency skill will hit for 75 damage.

Auto-attack potency actually varies with weapon delay. It's only 100 for a weapon with exactly 3.00 delay. All weapons get normalized to 83.33 potency per GCD (100 per 3 seconds), but their actual potency per hit will vary.

Edit: OP, being a level 13 Pugilist, is using weapons with a 2.4. delay. That gives his auto-attacks (2.4 / 3) * 100 = 80 Potency. If an auto-attack hits for 50, his unbuffed, no form, no position bonus Bootshine (Potency 130) should hit for about 81 (50 / 80 * 130 = 81.25, rounded down).