And Swiftstrike buckler is the only non-trinket item that provides an attack speed bonus.

Ninjas are often known for their speed, so we should have an armor devoted to speed and dodging.
It seems wrong that Vog Cub Set is the only piece of equipment that provides a speed boost.

Ninja Set would be a devoted set for mobility and attack speed.
Ninja Armor should have Normal and Shadow defence. Normal because you just need that, and Shadow because Ninjas are known for lurking in the shadows. They should take less damage from the darkness.

No elemental defence unless you wanted to go the path of a fictional ninja with ninjutsu and whatnot.

You could also tie this in with SEGA's Shinobi series of games.

Other stuff:
I'm wondering. Why is it that all the wolver gear from 2-4* has attack bonuses for swords but neither Skolver nor Vog Cub inherits this.
And why does Vog Cub all of a sudden gain Elemental Defence, but skolver/the other wolver gear doesn't? This could would make negative freeze resistence and any sword damage/charge buffs a worthy tradeoff.

Also, gunslinger set seems to base itself off of wild west appearances with the cowboy hats and the sashes.
Why not make it's bonus an attack speed boost? Since a good portion of western duels (in films) were quickdraw duels to see who could draw and shoot first.