You can save actors. I was able to save the array of actors. I am still able to save it.
I can do something like: “Take this actor → save actor+transform-> exit game → Actor will be spawned on level creation → Load the actor+transform” The same actor will be at the same place before I exit the game.
The problem comes with this. When the player would be a little bit longer in the game, and you make a save file with actors, in few seconds that Save Actor will be gone.
Oh, and you wrote “you need to have them in an array” so you meant as class reference?