Misfire after warming up

Hello,

So, it all started with a general misfire. I replaced spark plugs and wires and the car ran great for about a week. Then car started to have trouble at low idle and would shut off out of nowhere at stops and started to idle rough along with misfire coming back not as bad as before the new plugs. So after researching what it could be I decided to replace the VVTI solenoid and clean out its filter and it is running better. But now car will cold start and run great but when it gets up to operating temperature and the RPM's drop it starts to idle rough. I have hooked it up to a scanner and it looks like cylinder 2 and 4 are the cylinders misfiring and sometimes 1 will join the party but it’s random. I’m tired of just shooting into the dark and spending money on parts I might not need. Also I did a real deep clean on my throttle body but it did nothing. Any help would be much appreciated thank you!