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Well, the addition of angels is good, but here is what I would do (I can understand if your certain playgroup or play style prefers it your way, its just that it would be a lot more powerful like this).
I would go -3x Replica, +3x Dispense Justice because you can either have a 3 drop grizzly that kills itself to slow down the opponents, or you can have them eliminate their own forces.
As well, -2x Propagator, +2x Journey to Nowhere because at the time you are making simple myr guys that can multiply, they might have out an Ulamog, the Infinite Gyre , which would not be fun to attack against.
Once again, just what I think would help this deck fight better, you do not have to take this advice if you do not want to.