I would go with BamaChips XCalibrator 2 from Doug (You can get it from Jusnes Modified). If there is anyone out there that knows the Ranger inside and out, it's Doug. Personally, I don't trust any other person's tunes.
Hard to say what gains you will get sicne we have no idea what engine/transmission you have. In your sig, include make/model/tranny/ etc. It makes answering questions a lot easier.