Since I saw no indication of other coins, like Dogecoin, I didn't know how it worked.
Just for the record, Dogecoin is mentioned both on the homepage, where the reward system is explained, and in the first post of this thread.
One thing is that I would like some variety, and not only mine Litecoin. Can you offer some suggestions as to how I would go about doing that?
Well, consider that with merged mining you
are mining more than just Litecoin. If what you mean is that you don't want to be mining Litecoin all the time, or that you would like to receive payouts in something other than litecoins without going through an exchange, then I'm afraid you'll have to look for another pool.
My impression is that you would add a pool in the Antminer "Miner General Configuration" that offers different scrypt coins to mine. Then, you would configure what you mine on that pool's site.
You probably want a profit-switching pool then. By the way, keep in mind that even though you can enter 3 addresses in an Antminer's configuration panel, the miner will only be using one at a time, and the second and third addresses will only be used if the miner can't connect to the first one. (Maybe you already knew this, but I'm also mentioning it for future readers.)