I have never played a melee swash but have seen the fighter/rogue builds with axes.  With Scourge bonus to light maces do they now take top spot?

Axe of Unseen Blow:
15-20 x4 Swash + IC
15-20 x5 Kensai
19-20 x8 OC/DC/Headsman Chop

Skullsmasher:
15-20 x4 Swash + IC
15-20 x5 Destroyer of Undead
14-20 x5 Pulverizer
19-20 x7 OC/DC

Also gain 5% doublestrike and 4 melee power.  Need LR+1.  There are other pros and cons but just seeing if this is true before I go farther.

Personally a fan of 17-20 x 4 generic Light Picks. Probably because I crafted some in the past.
They become 17x5 with Kensai third core. 16x5 in Divine Crusader.

Also that Kama is good, but it did break down fast in harder content in my experience. Get multiple.

Vistani daggers sound like fun, and that new Aasimar thing, but I don't have em and don't plan to get em before March, so...