It's almost always better to buy coins than to mine, but mining is essential, so I hope that every MRO user and holder will mine, if only to protect themselves, and decentralize the network.
That that is your goal (and I wholeheartedly support this goal) then solo mine from the wallet:
[wallet XXX]: start_mining number-of-threads
Maybe you get lucky and score a block but even if you don't you are helping to protect the network.