I am a DE ISS Spectral Dancer, lvl 99 turning 100 soon. Tauti Dualsword? or Enhanced Shadow Dualsword? Which one can be further developed? Which one will be better for me in terms of a weapon. I often solo mobs in HB, need something can kill the mob faster.
Enhanced shadow dualswords are the way to go for pve farm. You can enhance them with a tyrr crystal and +15% p. Critical damage augment.
I also recommend buying the 200% xp rune bundle that comes with the rare accessory pack (store promotion right now), those boss jewels give the best bang for your buck for increasing your damage output.
For kills mobs solo in HB; obviously with enhanced shadow dualsword u will kill more quickly (more p.attack and 10% pve bonus)... but in the future killing solo stronger mobs not, that because iss is not really a damage dealer.