Your weapon damage scales off your stamina pool. So more max stamina increases it.
It also depending what weapon, skills, slotted abilities, enchants, traits, buffs, effects and situations you are in. Weapon damage isn't just "Weapon damage". Are you looking to increase burst damage, as in do as high damage as possible, as fast possible? Or increase overall? Damage against 1 target or many? What targets? Bosses? Players? Mobs?
Your damage depends on
- Weapon damage
- Weapon Crit
- Weapon Enchant
- What type of damage - Phys, poison, fire, etc
- Weapon damage penetration effects etc
Also, your damage depends on your targets resists, buffs, effects, armor, blocking and what kind of type of target/player, since they have very different resists.
Your weapon abilities and light/heavy, your combat style if you will, is where you increase your damage the most. What sets works for one player, may be useless for another, depending on play style.
Hundings is a general good set to use for most Stamina Weapons. But what works for you, really is up to your playstyle.
In my case I don't have that much weapon damage. 2900 unbuffed. But I crit like hell, do massive AE damage, while draining stamina back at every target I hit. Always have damage shield on me and hard to kill. I rarely run out of stamina even when I spam abilities.
There are lots of sets that would up your weapon damage, but your play style and how you use your abilities, is where you find the biggest increase.