I mean, 7/11/7, you may not out-muscle a Stormcrow, but you'll sure as hell have the ability to hit and fade with him all you want.
Really want to beat up on some poor victim? 4/6 heavy Mechs are your FOOD. This will simply chew up an Orion and spit the bones out. If you're sneaky and lucky, you can even put a Masakari on the ground after a while.
I totally agree. 7/11/7 is great. I prefer it over the Viper's 8/12/8 because I'm mostly attracted to the +4 TMM for jumping, and there's some more pod space at the slower movement profile.
I feel like the Clan 40-45-ton omnis are the best to compare to the Grendel, and my focus in that respect is the Shadow Cat. At that point it's fast with no MASC, higher jump, lower pod space vs. fast with MASC, 1 less TMM for max jump, but more pod space.
I kinda want to say the Shadow Cat is superior since the 6/9/6 movement plus MASC saves weight, and I think 6/9 is good enough for medium 'mech speed. Being able to move 12 when you need it is always nice and worth the pod space and MASC hazards.