Well, your core temps are within the safe limit... - but I do find them a little bit high...
I assume that those top 200mm fans are not directly attached to the H100's radiator... those do not have too much effect there... - the H100 rad is a high fin density one, so having the fans setup as pull with a weak push like you have gonna decrease the performance...
If you want push-pull, then you rather mount 2-2 fans directly on the rad... - or at least invert the air flow direction on your present setup...
Doing prime95 stressing won't prove you anything more than your system is prime95-stable... whatever long hours you would choose... - I would start using the system as for my everyday needs, if it can handle it, then it's stable enough!