The problem is if you lose / can't handle their hyper aggressive opening then it's really hard to claw things back. They will have a huge advantage in numbers which makes the 3-way strength chart meaningless, and most of the best counters don't leave you with much to work with even if you do push them back. Plus in the time it takes you to assemble something that can walk into the hoard and survive you've lost 1.5 arcana stones.