Ho to all…i want to make the best build as Shinobi…soo my question is, worth doing sw c3?cause the copy make all skill of swordsman tree obly and double slash maked by 5 copies seems soo strong…i need some advice…thank you 
Good concept…however, the only problem is…Bunshin clones are moving in random, sometimes in order sometimes scatters…
It’s difficult to land the Double Slash without a proper positioning and with a right time…
Be careful in bunshin clones…although 5 copies of you seems nice but there are consequences too…
I suggest you go for this build if you want PvE with PvP potential too:
SwordC1 > SwordC2 > HopC1 > HopC2 > SwordC3 > Dopple > Shinobi
for more info go to this thread, everything will be explained to you 