Yo, its nice track, like that dark atmosphere!
Vocals are to narrow for me and dont have it own space.
Try out this:
on 1 track is your main vocal, keep as it is.

on 2 track dublicate your vocal and add reverb with 100% wet, room size almost small as possible and decay time around 1-3 sec (exeperiment with last two parameters), after that you should get kind of metalic sound, then add before reverb a ping pong delay with max 20% wet and small feedback time. After that you add eq and high pass till 500hz, with high freq you do what will better fit with your vocals, you can bust it for more metalic sound or cut if you want. And in the end of your chain add simple delay (100% wet, with delay on left of right side from 10 to 15 milisec) to make it really wide.

You can also try out this fx - https://www.youtube.com/watch?v=vuY0dml_pWU

Maybe this will help. But dont follow it too strictly, experiment with every parameter you want and add any plugin you want to.

Good luck!