Why bother worrying about the dispels? My priority is dissolving your Mage Wand and just swarming your Mage because you do not have enough creatures for me to worry about. If I am playing a Necromancer, I bring out twelve zombies by turn eight and just eat away your six creatures in a few turns. If I am playing a Beastmaster, I bring out a couple of Grizzlies with unavoidable and eat your Angels. I am playing a Forcemaster, I charm or sleep every creature and kill your mage one on one. Without more creatures spells, the spellbook is fragile and lacks resilience and force.
Sure by round 8 you can have 12 zombies, if you basically spend your Mana on Nothing else. By that point that necro should just be dead.
Same with the bears, if you run allandel, he's just going to mitigate a lot of their dng potential with stuns.
I think your focusing too much on creature strength and less on board state.