I stand corrected. I read primorac and just assumed it was a carbon layered rocket considering op is looking for a slower all around. If that's the case I agree with dajdosta that your blade seems fit for the job your describing. Don't know anything about grubba but there's an old guy at my club...
For inverted rubber (on fh) you can basically use anything. In my experience it's rubber thickness that matters when chopping. 1.5 mm is my preference. Perfect balance between control and power. Would recommend all-around rubbers so you can get comfortable chopping while still being able mix...
The Butterfly Petr Korbel sounds exactly what your looking for. I have one on order and am excited to try it. From reviews and research I believe it to be an excellent blade for all around play. I'm not familiar with the primoracs (I would assume some layers of carbon) but the korbel is all wood...