If you are hitting 58 with something like Prime95 with your fans not on max, then id say that's quite high compared to other loops but cant say for sure whether something is wrong, as i have never used your block before and as i understand it, its one of EKs first entry level blocks, so that may be whats letting the loop down.
The radiator and pump are up to the task for sure, what fans are you using?
Are these load temps in game or stability testing?
Is your voltage on manual or auto, 1.38v is a bit high for just +200MHz, most should be capable hitting that with 1.35V.