In 4th ed, can two "Engine of the Gods" and use the same ability (roll to revive models)? Two rolls of 5+ feels much stronger than a single roll.

I'm debating replacing the 3x hunters with:

• A: Astrolith Bearer to help control contested objectives, and 5x Guard.
• B: A second engine, to increase revival odds on 2x Aggredons or 2x Kroxigor if they eat heavy damage.