I heavily rely on Bolas 2 for these kind of objectives. However, planeswalker abilities that damage creatures no longer count towards this objective. Spells like Exquisite Firecraft or Solar Blaze (even hitting your own creatures) all DO count.
Please fix, as this has quite the impact on competitive play.
Edit: Enraged objective is where you have to deal X or more damage to creatures.
//Edited Title - Tombstone
Tombstone said: The team has confirmed that this is a bug with the Enraged objective in which Planeswalker abilities do not count toward the objective total.