Try to wait until after Terminus uses his ult to use yours on him. If you Dragon Punch before he ults, he'll just come back to life and you'll be at risk of being in the blast.
Crowd control reduction or immunity is critical against Atlas, especially if you are a tank or support. This will make you less vulnerable to his Rewind effect, and reduce the time you are trapped by his ultimate.
When going for Io, be wary of Luna, as her stun will track you and knock you down if you are airborne. Luna is otherwise an easy target to poke down if you don't have a better target, either killing her or forcing Io to pull her back to safety.
Yagorath is a massive unprotected hitbox, ripe for the Blastflower talent. Your damage will easily ramp up against her, and she will be forced to retreat or die.