I'm not expecting to make much using mining to be honest. I'm just fed up with ETH/ETC right now so I though I would help support the STEEM network. If I had the server setup know how I might instead run to be a witness but right now I don't have the time to do the work.
Yes powering up makes sense. I've been slowly buying STEEM and powering up. I've essentially tripled the amount of SP I have over the last few weeks.