As title says. I found that in miner evacuation no matter the comp, I always end up getting roughly the same units.
Mist Opportunities requires specific responses by some commanders when facing zergling compositions especially in the early game.
Brutal+1 difficulty is good to play as it will force you to adjust your strategy to counter certain mutators.
Malewarefare as you fight lots of little waves of the enemy comp so you really need to have built the correct counter units, especially near the midgame.
Some commanders are really straight-forward 
Perfect example is Abathur P2 - there isn’t a single map or enemy comp which would force you to build anything but more swarm hosts. Most maps can be completed on brutal while staying on one base and having six Swarm Hosts. 