Oblique shot is for grinding, the rest are for boss and PVP.
Hold ->immobile -> charge CS.
Manly Duel Huska, i will hunt you down Drown Ranger.
Edit: Fixed 2nd build name and skill distribution.
Ill comment on the 2ed and 3rd build.
2ed build:
You might want at least one point in Pain Barrier, thrust 4/5 isn’t that much of a negative impact. Not much to say about the highlander path. But for Corsair, Dust Devil doesn’t look like it does AoE damage (it’s a single target skill), so you may want to not put a lot of points into it. Dust Devil is the only corsair skill that takes advantage of the duel wield (though I don’t think it matters too much), but the damage scaling sucks on it too. Iron hook also seems like it only needs one point in it as well.
3rd build:
Personally I think bash is a waste of skill points, and I believe Restrain is more useful because it has a 20% stun chance (synergy is much better with Barbarian though). I would maybe go Barbarian c1. Unless you REALLY want Hoplite c3.
I would recommend taking points away from Stabbing, and put them in Spear Lunge, because it increases you damage from other thrust attacks (which i assume is pierce damage (I could be completely wrong)).
You may also find punish very lack luster as it only hits knocked downed enemies. I would suggest 1 point in Punish and 4 in Mordschlag. Or none in Punish. 
Now I shall sleep! I’ll reply back later if need be.
“Makes it vulnerable to Thurst attack” Is Thrust the same as Pierce? The reason I ignored Spear Lunge was because of that, I’m not sure if its a miss-translation or not. If It is Pierce, i will max spear lunge then.