1999 Dodge Dakota blue smoke and misfiring

The engine is shaking and shuttering. I replace spark plugs and did cap, rotor and wire. Burns oil and puts out blue smoke. So I replace the upper and lower intake gaskets. It didn't help. Rough idle and runs roughly. I put a scan tool and it can up as misfire still. I had carbon build up on the plugs and I replace them. I'm stump. People told Me heads needs to be rebuilt. Some told me bad injectors and some told me valve stems and seals