I've been playing around with my Farsha a lot lately, and I've come to the conclusion that this weapon is not meant to be used with duel-weld. It looks to me that this weapon was designed with the use of fencer in mind, when used with fencer it seems to work somewhat well.

I recently tried a slightly different setup from what i usually use. RR Apoc and lion with a shield. This gives me 40% lightning damage 25%triple attack and RR(enough said). Crits with aftermath where hitting for 650-750 at a good rate(my hardest hit was 1200 with an af3 +2 proc). Its a good idea to save up 200% TP though, for a good duration.

The damage you do will not come from the WS but the aftermath. With duel-weld your delay will be to high to gain enough benefit from the aftermath to make it worth using. By one handing the axe(or axe and shield) you gain the benefit of fencer(5%crit rate +40 TP bonus) and faster attack rounds. I'll just to assume that a war with a farsha is going to have 30%+ double attack(trait/gear), a good amount of double attack/triple attack atmas, and capped ofnear capped gear haste.

Its not the best weapon choice for war but if used right it can pull off some good damage. But make a Ukon if you can