In the "catch lightning in a bottle" category I would take a look at Ross Ohlendorf who is having a good season for an otherwise historically bad CIN team. At age 33 he somehow has increased his FB velo up to a career high 94 (perhaps by scrapping his 2 seamer).
His peripherals are very good (9K/9, 2BB/9, 1.12 WHIP) and should cost very little. Perhaps a Bryce Brentz or similar fringe older prospect likely to lose anyways should get it done.
He is a big upgrade over Ramirez and gives you some depth in case Koji or Taz breaks down or Barnes implodes.
His peripherals are very good (9K/9, 2BB/9, 1.12 WHIP) and should cost very little. Perhaps a Bryce Brentz or similar fringe older prospect likely to lose anyways should get it done.
He is a big upgrade over Ramirez and gives you some depth in case Koji or Taz breaks down or Barnes implodes.