Random thoughts...

When you replaced the MAF, where did you buy it? Did you buy just the insert (held in by two screws) or the entire assembly? If the latter, where did you buy it and what brand?

In addition to plugs, have you changed the fuel filter? If so that takes care of the FPR.

One day when you don't need the car for a couple of hours (and it's been sitting all night) go out and start it up. As soon as it starts and is sputtering etc. shut it off. Then remove one plug from each cylinder and see if any show signs of misfiring (black sooty carbon deposits, wet with fuel, etc.) If you find any like that, replace the Fuel Injector on that cylinder.