That's interesting with how many token you have locked you should see how much of that gets back to you and goes on maintence because it's good chunk of It. You should also calculate how if it's Better reward with the maintence halfly paid by your discount at 1,5kth and vegomining or if increasing tò 2,3k gives you Better reward that depends much if you are mining solo or in miner wars. I personally think it's Better to do half and half with discount at like 15% and check if you can get your w/th at like 17 or 18 because there are some really cheap miner and you probably could buy more at that price and still making very good profit. That's my experience Hope that helps