After the class tuning on the weekly reset, Sunfury Mages have been dealing with a frustrating bug regarding their Hero Talent Burden of Power. Our Arcane Mage guide writer, Porom, details the bug and discusses the frustration with the frequent mechanical changes to Arcane since the War Within Launch.
Arcane Mage Guide
At the time of publication, it appears Blizzard has fixed the bug below, however, the functionality currently still does not enable someone to Blast into Barrage on Spheres 5 without losing Arcane Charges and not spending Burden of Power on the Barrage.
Burden should be generated after you generate your 6th Spellfire Spheres stack, buffing your next ability (Arcane Blast or Arcane Barrage), when this is consumed, you should get the Incandescence buff which makes your next Arcane Barrage generate 4 Arcane Charges and spawn 4 Meteorite which do a bit of damage at the target's location.
What has been happening?
Historically, Burden of Power could be double dipped by queueing an Arcane Barrage after Arcane Blast when you have the buff, to «fix» this, Blizzard changed it so that Burden can no longer be double dipped, but still allows you to queue the spells and generate and consume Glorious Incandescence, such that Blast into Barrage with Burden would buff your Blast, then Barrage would trigger Glorious Incandescence, refunding your Arcane Charges and generating the Meteorites in one smooth motion.
Why are things screwed up now?
There was a very low-impact bug which allowed players to stack Spellfire Sphere quicker by queueing Arcane Blast after Arcane Barrage on Spellfire Spheres stack 5. Yes, there are two separate buffs with almost the exact same name, the differentiator is the 's' at the end.