Note the "Duration Factors" section. It shows the base duration, the maximum attainable, and how skills, attributes, and affinities affect the duration. And rather handily (if I do say so myself), at the bottom it tells you what duration your character would be able to achieve based on your current stats.abil desc strength
Information on Inner Strength:
Draw upon your inner strength.
OOC Info: (Increase your strength. Stacks with other strength modifiers. Type help strength for more info on strength.)
Usage: channel strength
Energy usage: -20
Cooldown timer: 75
Prerequisite Abilities:
Tactics: Dreadnought -OR- Tactics: Berserker
Duration Factors:
Base: 25
Max: 60 seconds
== Skills ==
Melee Combat: 0.025/rank
Meditation: 0.5/rank
== Attributes ==
Strength: +15%
Willpower: +5%
== Affinities ==
Discipline: 0.5/rank
Rage: 0.5/rank
Your Duration: 37 seconds
Affinities, yeah. A thing I'm working on. More on that later/elsewhere.