It sounds that like me you don't have a lot of experience with cryo. For that reason alone I would just use the cryo as planned and not add regular to see how it plays. Since cryo hops are so concentrated you could divide the steeping hops (I am asssuming a 0 minute addition) into two additions.
I also think for that size batch and gravity the amount of hops are enough.
I hope you enjoy, I have used cryo 2-3 times now and am impressed by the results.