You also wont struggle much with card draw, thanks to support options like May, Copycat, Poke Ball, and Professors Research
If Ursine Monstrosity isn't forced to attack the chosen player for one of the above reasons but can still attack, you may choose to have it attack another player, a planeswalker, a battle, or nothing at all
Defensive creatures like Canyon Crab are perfect for staving off aggression
As usual, I'm going to start with the general principles that make anti-Abzan cards good, and then some specific in-game tactics that are effective against the deck
Interestingly, one of my jobs as a Magic designer has been trying to reduce the impact of math on the players