Assassin/Ninja Help Good Thunder Build? (boss Soloing + Li)

Hi, I've been looking for a good thunder build (with no mythics i'm broke) that can solo pretty much everything and can get through li with or without some help.
Also I'm hoping to avoid going through hive or doing 10000 ff runs, but if it's unavoidable, whatever.
Oh, one last thing, I don't have a build on any class yet that can get through li, so no dia tier stuff. Gold is ok, but no dia. (please nerf cybel for the love of god)
Thanks! UwU

 

Hive dagger: https://wynndata.tk/s/1PvkqF Needs water and master items (mpc and infused hive), you need to run ff 4 times, and should be able to solo all of LI outside of Cybel.
Swap gold brace and neck to diamond once you get it, and put extra sp into intel/agility
Black: https://wynndata.tk/s/6prw9N Requires master and fire items (anima+cinderchain) and 8 runs of ff for megabyte. Again, should be able to solo everything except for Cybel.
Ripsaw: https://wynndata.tk/s/OQfaPV My friend claims to have used this to solo all of LI except for Cybel (and there was one other boss that had good def to thunder so he used a secondary but I forget which one he said it was). Requires master hive (bpa) and 8 runs of ff for giga.

For all of these, I recommend bringing a secondary that does some type of damage outside of fire/thunder, as trying to get through Cybel with a thunder/fire weapon is usually the equivalent of trying to run straight through a solid brick wall. Sitis is the first that comes to mind, and all of these can use Sitis if you have enough sp, so that's at least an ok one (sitis isn't as good as a secondary and much better when using a build focused around it imo).
Also tbh they don't need to nerf Cybel in terms of damage or defenses, but what they need to do is make it where his 2nd, 4th, and 5th phases aren't pretty much pure rng (1st and 3rd phase are honestly jokes).

No clue if any of these could get you through a war, but I doubt it since they weren't designed to be used for warring.