I'll tell you want you need to spend your skill points for the most effective weapon
(if you dont like ideas then dont bother looking. here are just my ways of making a extraordinary weapon!)
The Cutlass
hack+slash+cleave+flourish+thrust= enemy in slices
Combos
hack: only one dosent give much
slash: yet again, one point
cleave: two or one point. still dont give as much
flourish: outstanding attack!! worth 4 or 5 points
thrust: really good! definetly a 5
Skills
sweep: one point. dosent seem worth it
brawl: stuns enemies so i would give it one or two
taunt: dont expect much so one
bladestorm: definetly a 5 point
Passive
parry: sure its fine put how much you want
endurance: all extra points could be anything so put as much as you want here!
HOPE THIS HELPS! 
NOTE:i'll be making one for the others soon so dont worry!
one more. dont put this on early do it when your cutlass lvl 20+ and retrain it. this is really important or else everything will fall aparrt