Your choice I would go with two so you can control the oil flow based on your desires and results on those rockers and pushrod tips
I bought a set of valve covers with spray bar oiling for my motor with the Jesel set up, I haven't ran that motor yet or primed it yet and I don't know what size the restrictors are in those covers, yet
I am using pushrod oiling also so maybe I will not have any issues with the top end
I saw your comment on using offset lifters so I knew then it had to have solid roller lifters in it
Good luck let us know your results please.