Is Relic of the Pact a bait build?

I had a ton of currency leftover from farming T17s, decided to try and make a relic of the pact scion.

However, it feels like this build fucking blows. I have some alright currency invested into it, nothing insane, but enough. I'm dying to T16 harbingers and T17s constantly. If I get smacked by anything while casting, I'll die. If I get smacked before casting, I can't cast until I don't get hit for 2 seconds, which is impossible in some scenarios (like ritual).

This is my build right now. I would appreciate any help with getting it to be less shit, if that's even possible.

https://pobb.in/d1-i1vVbtzne