YZ250 Jetting Suggestions? Help/Insight?

I live in NC. Elevation where I ride mainly is between: 1350-2600ft above sea level. Kinda of a jump but that covers every trail where we ride.

So my bike is really rich. Has oil thrown all over the back end, bogs on top when cold and takes a while to basically “unload” itself to somewhat rev out on top. I have had issues ever since I got it rebuilt. Before it surged (only a little bit, I would crack the throttle a few times and it would stop) when I would stop in the trail at those elevations stated above (issue wouldnt happen at my house or at the builder shop). So I went to a 58 on the pilot (stupid I know) but it stopped the “surging” i was experiencing. But now I am honestly tired of it running like crap so I have taken upon myself this week/weekend to get it running crisp like it should.

I did tried to do a pressure test myself and it wouldnt hold psi (as in it lost 3psi in 30 minutes). I drenched the bike in soapy water with no air bubbles anywhere. I have not lost any oil and didnt not hear hissing or anything from left side crank seals. Also I think I was losing air possibly at the reed boot connection of my tester because I had to use tape wrapped around the pvc fitting to make a snug fit and the tape kept wanting to “suck” into the pvc fitting while clamped into the reed boot.

So now I am just going to put it back together and mess with the jetting and see how it goes from there.

I have the keihin PWK38 (i beileve what came stock on the 10’ model yz?)
58 pilot
Unknown main (will get legit keihin jet tomorrow)
Needle 3rd clip
Stock reeds as well (extremely small gap showing light).
FMF Gnarly/Powercore 2 (plan on repacking tomorrow as well and getting the connection coupling)

I hate bugging people with repetive questions but I just want a good running bike for once.... thanks you guys!