Assassin/Ninja Help Sitis Build

Hey, as the title says I am looking for a sustainable endgame build, relying on Sitis.
I am looking for a non glass canon build with at least some damage.

Your help is appreciated.

 

sitis is not really a good weapon, but it can be used like this
https://wynnbuilder.github.io/#4_0250U20Jo0Jq0t80TQ0OJ0OM0lO0e+I1t10-Y1g00001004fI
https://wynnbuilder.github.io/#4_0250U20Ja0Fp0t80TQ0OJ0ty0lO0o+I1m-J1I1g00001004fI

 

Thank you very much @DeltaWave35 .
Is there any non-mythic alternative to a good endgame assassin?.

 

the most recomended builds to use are black spellsteal and heavy melee, less recomended but not bad are the tier, cancel and rawstack
black is surely the best non-mythic spell assassin build, there is also blur that is a bit worse but not bad at all