I think that is not that usefull throw in just a bunch of high strenght minions that don´t make some sinergy togheter. Even with Grimby they will clog your habd and if you face some choke or tank deck you will have no way of stop them. I would recommend that you go for an Troll Swarm, Besigers or some more focused Sauron/Balrog deck.
I have one deck with Grimbeon and i get him along with Tank Dwarves +
Brand and they do really fine, cause you have a bunch of fighter comps plus some dawarven tricks

I pair it with Troll Swarm.