Is your adjuster screws hollow? Is the shafts banana grooved? This is where we have problems with after market Hemi rockers. (some) burn up in street use, while the same setup lasts for ever in race conditions.
Id say that with increased engine rpm plenty of oil flying around for the adjusters.
But you can look into the hollow adjusters, increase or redirect the size of the oil passage. Ad the banana groove rocker shafts. Take the cam and groove the correct cam bearings, IIRC #4 with a .050x.050 oil groove.
You cold drill and tap the blocks valley area and just provide full time oiling that way.
A high volume oil pump will provide more oil (everywhere) at idle and just off idle
Just some thoughts.