High c1 can be used in a spear or even rapier build to some great effect (+100% dmg, I think… may be 50%, not sure what’s crossguard bonus exactly), but will require switching to 2H Sword actively (and that may mean lag for you, sadly). This will be VERY useful while bossing, and you’ll need bossing if you want to get attribs high in a shorter period. + Cartar Stroke is not that bad actually. Cheap to max and packs solid 3 hits of Strike, usable with any weapon.
So basically you CAN go corsair or even shinobi / fencer in this build.
You can also go classic full-PvE route of High c1 - Barb c3 - Doppel c2. A glass cannon with a strong slash AoE + Pouncing is very, very good, even in PvP.
So its mostly about your preferred weapon.
You know what’s gonna do the most brutal damage once c8 is out? Sw1-High1-Hop2-Cor2-Drag2. Crossguard + Lunge + Serpentine Attrib at c8 => Hexen Dropper, Dragontooth => gg wp