Assassin/Ninja Help Looking For Ways To Improve My Hybrid Build

Here is the build I've got so far:

https://wynnbuilder.github.io/#4_0690F+0uX0Qz0Jf0uP0FN0OO-1A9A9A96262AY9e921f1a210u0t1g00001001Z6

This build does crazy spell damage, and very good melee damage, but I'm looking for ways to add in some sort of lifesteal for some sustain, without compromising too much, or somehow cram in some more damage. I'm hoping to keep the 1 spell costs, and at least a good portion of the damage. Having somewhat low mana steal/regen isn't too big of a deal since it is a hybrid, but it would be nice to have at least 3 total.

Feel free to use crafted items if you want, or change the weapon's recipe since I haven't crafted it. No restrictions, I just would like to use warchief since I recently got a very good one with almost max neutral damage, melee damage, and earth damage.

 

better?
https://wynnbuilder.github.io/#4_0690F+0uX0Qz0Jf0BK0BI0Ji-1A9A9A96262AY9e921f1Q210z0t1g00001001Z6
WynnBuilder build:
> Blue Mask
> Far Cosmos
> Chain Rule
> Warchief
> Breezehands
> Flashfire Knuckle
> Flashfire Gauntlet
> Contrast
> CR-1A9A9A96262AY9e92 [e6e6e6]

 

Ele defs are struggling here and it's hard to fix that while using fast hybrid warchief... I was thinking maybe trying to fit in jingling jester/trickpockets as some sort of knock off spell hybrid?

I'll mess around with it, might take a while on mobile

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https://wynnbuilder.github.io/#4_0690PY0tV0Qz0Jf0W70K40UB-1A9A9A96262AY9e921a1Q210S111g00001001Z6
WynnBuilder build:
> Blue Mask
> Leviathan
> Conspirator's Trickpockets
> Warchief
> Breezehands
> Old Keeper's Ring
> Prowess
> Renda Langit
> CR-1A9A9A96262AY9e92 [e6e6e6]

This is... Incredibly janky, but could be the blueprint for something cool?