It looks like you answered your own question: "e.g. -allcoins EXP". And there is no need to scroll through 18k posts: The same question was answered on the very same page TODAY by Coroto
Seeing that answer is why I asked mine, because I wanted to know if there was an option to use the UBQ DAG like can be done with EXP. I assumed that these coins use different DAGs, or that UBQ is not a valid coin for the devfee to mine. So, no, my question was not answered on the same page by Coroto today.