Of course we mine directly LTC at the moments when it's the most profitable. But there's a variance and there are hours with more blocks found and hours with less blocks found.
No, my suggestion is to mine LTC
exclusively for a while, ideally in coordination with the other big pools, to give all the smaller coins the chance to become more profitable again. Right now we're still switching between diff 16, diff 11, or diff 6 coins... only sometimes it's LTC or DOGE.