Assassin/Ninja Need a Heavy Spell Grimtrap build

I've been raising my assassin recently and I kinda want to get a grimtrap. Though my assassin is still ~lv80 but I want to do some preparations of what to do&what to go for when I'm around lv100. So yeah, that's basically it.
(and I have a revenant that idk how to use, maybe I can use it in this build idk)

 

https://hppeng-wynn.github.io/#4_06...9X9X9X9X9c9m910K40uY0QZ1p1ayV140e1g000010063O
WynnBuilder build:
> Brainwash
> Bete Noire
> Tera
> Phage Pins
> CR-19X9X9X9X9X9c9m91
> CR-19X9X9X9X9X9c9m91
> Prowess
> Ambivalence
> Grimtrap [f6e6f6]
by @Leafish

https://hppeng-wynn.github.io/#4_06...FN-19X9X9X9X9X9c9n910QZ1u16z+0f-i1g00001001Z6
WynnBuilder build:
> Brainwash
> Cardiac Arrest
> Chain Rule
> Blind Thrust
> CR-19X9X9X9X9X9c9m91
> Unspeakable
> Enmity
> CR-19X9X9X9X9X9c9n91
> Grimtrap [e6e6e6]

 

The damage seems really nice, but I want to ask something.
I know I asked for heavy spell build, but am I able to recover the mana used and cast vanish in a short period of time? (for surviving and casting another spell)

 

no; that's the entire point of heavy spell (you don't cast spells often)

 

wow that first one is actually... pretty ok

in terms of it gets 30k dps which is stupidly low for mythic assassin but alright for heavy spell

In less words, heavy spell grimtrap doesn't get good dps; maybe fun to play? (super super campy) but otherwise i would advise against it

 

Second build is cool, 100k smoke boms can decimate a boss
Also i can sell u my grim if u are interested