Assassin/Ninja Help Trying to find a good build for beating LI for the first time

I have used morph with a Nirvana, can barely beat the first boss. So far, I've used a bit of an outdated/over-improvised build (I couldn't use illegal combos so yeh):
https://hppeng-wynn.github.io/build...0o140o0o1g000010036C0z0z0+0+0+0+0-1TlNJzilQU2

I'm trying to sell my nirvana where needed, so my budget if it happens would be just under 1stx, but I'll see what I can do. This would be solo btw, and no I can't be arsed to get a carry unless well, I'm just dead weight.

 

https://wynnbuilder.github.io/build...9I10009I10009I1004fI0V0z0+0+0+0+0-1TjdfM5-jZ3

this is a good nirv build u can easily solo li with this if u cant afford go to bluethesniper channel and get the tstack inferno build

 

3 words....

BIRCH WOOD DAGGER