KhunKrittamate
Basically, everything looks fine - high data rate for LAN port, no CPU queuing, decent disk response time. The only thing to address is Disk Page Fault Wait time as I also notice substantial (not very high but not too low either).
Since you use the core bank solution that I know for a long time. Are you aware that during the nightly batch run, iCluster apply job is stopped and is started only after a successful finish of the batch run? If so, it is natural to take time for the apply task to finish (as opposed to real-time apply).
By the way, in the chart you sent below, I notice the rightmost vertical axis show the number 1, 2, 3, 4... Please make sure it is not 100, 200, 300, .... or 1,000, 2,000, 3,000, ....