The unsaved are God's ministers?
He doesn't need me to save the world? thanks Jason, I'm so glad you told me that. That's a relief...
Why not invent an Iron suit? don't need one.
Iron man, bat-man.. mocking.. Hey Jason, why did God use David to slay Goliath? don't ask me, you ask Him yourself. But if you're going to be rude we can just stop talking.
I say this because I actually wanted to be a super hero in some way like what you are doing. To fight bad guys with my fists or some kind of weapon. But I realized that after being saved, my battle was a spiritual one and not a physical one.
As for the unsaved being God's ministers: Yes, Romans 13:1-4 talks about that. Also, Romans 9:17 says this:
"For the Scripture saith unto Pharaoh, Even for this same purpose have I raised thee up, that I might shew my power in thee, and that my name might be declared throughout all the earth."
And Isaiah says that Assyria was God's rod of anger against the hypocritical nation of Israel.
Isaiah 10:5-6.
O Assyrian, the rod of mine anger, and the staff in their hand is mine indignation.
I will send him against an hypocritical nation, and against the people of my wrath will I give him a charge, to take the spoil, and to take the prey, and to tread them down like the mire of the streets.