I would fit the discs. The discs provide a seal for the pathway of the circulating oil. If they are not in place, the oil will have a hard time reaching its destination. In this case, the oil will seep back down into the timing chest rather than oiling the cams. Regarding the cylinder feeds, I have never used them, but I would keep it stock in your case as there is little harm. Do not leave out the seal to restrict flow to the cylinders, instead, use a metal disc with a smaller hole behind the disc seal or close the hole down in the timing cover.
Check your timing cover to see that there is a metering jet under under the decorative cap and the scew. This jet determines the balance of oil delivery between the crank and the cams.
David