Assassin/Ninja Help Dawnbreak Heavy Melee Build

I got a dawnbreak recently and was planning to use this build
https://wynnbuilder.github.io/#4_0K30oY0CE0640I90I902d09t0211p11-Q0y+t1g00001001Z6
by swapping blind thrust to dbreak and reducing some defence

But I really dont know if it'll work and top of that my dawnbreak has blue main dmg and almost blue thunder dmg but has 1 ms

Will this dbreak even work for a heavy melee assassin? If it does I would like a proper build for it(cause I have 0 knowledge on builds lmao)

 

https://wynnbuilder.github.io/index.html#4_0K30oY0Ek0QR0I90I90SL09t0211f1G-Q17-Y1g00001001Z6
WynnBuilder build:
> Obsidian-Framed Helmet
> Taurus
> Earth Breaker
> Dawnbreak
> Fractured
> Fractured
> Momentum
> Drain
> Anvil Crawler [e6e6e6]

https://wynnbuilder.github.io/index.html#4_0K30oY0CE0QR0EE0EE0SL0BR0211f1G-c1I+x1g00001001Z6
WynnBuilder build:
> Obsidian-Framed Helmet
> Taurus
> Writhing Growth
> Dawnbreak
> Downfall
> Downfall
> Momentum
> Gigabyte
> Anvil Crawler [e6e6e6]