All of them can go, but they are not going to send all of them to hunt because they are domain gods now. In fact, they are not going to send two clones out to hunt.
A single domain god is more than enough to steal from a true god. Just their ability to fly in the divine realm has put them above other gods.
But there is another important reason why they can't send two domain gods which is that they don't want to make the other gods suspicious of them. After all, they only got one domain. They won't be able to explain how six of the became domain gods with just one domain. So only one clone was assigned to go.
Their angel warned them as he left, "If you die, you will lose part of your domain as well as your divinity. So you have more to lose now."
