Assassin/Ninja Help Grimtrap Build Question

I've been using Thrundacrack as my main weapon for a while, so I'm planning to sell my Thrunda and buy a Grimtrap to use for my Assassin class(even though Idk if Grimtrap is worth selling Thrundacrack). I made somewhat of a Grimtrap build, but I don't think it's that good.

I'd be thankful if you can suggest me a build with these conditions-
>Non-Melee
>4+ MR
>No other mythic armor other than Warchief
>(not that important)At least some elemental defenses

(Idk if Grimtrap is worth selling off Thrundacrack)

 

https://wynndata.tk/s/QsPH5f
hybrid grim is honestly better and tcrack gets better damage and is more fun to build personally

 

thanks, I was a bit tired using Thrundacrack.
I guess I'll edit a few bits about the build and use it someday.