Sparking Battle

FYI after you've done this 5 times. A follow up achievement called the same Sparking Battle has to be done 15 times more for a total of 20 times. This is needed for the meta achievements Ruffious's Bid that rewards a title and the [item=223158] mount.

However you can get more done than once a week. I used some of my lvl 70 alts with War Mode on. They were able to pick up the quest and fly around in the according zone finding the [item=219934].

You get [item=219934] from:
10x From World Quest in the according zone even pet battle World quest.
5x From [item=212493] (some can gives more than 5 sparks)
5x From Treasures (not the one-time-pick-up treasures)
5x From some Rares (not sure how the reset on rares work) But don't bother much with rares if you killed a lot of rares.
EDIT: It looked there is some bugs with some rares. The first rare of the week per account should give you rep. And therefore also sparks. But i found that it's not always the case.

No spark weekly this week if you're after this achievement. Hopefully it's a bug and not effectively making the world PvP meta for TWW unobtainable.