That quest could be 30 wins required if you're unlucky. It's both risky and time consuming. Another quests to consider changing is the one to beat a team in the arena with higher power (Plarium: "power doesn't matter", also Plarium: "power matters a lot") since it just screws over people who don't go hardcore speed team, as if that needed any additional encouragment.
I'm not particularly fond of the beat-a-FW-boss one either, nor the ones to play a classic/tag arena match with a specific affinity or faction. At least the latter ones can be done by just throwing away a token at worst, but how far do you have to be for the average person to be able to put together a reasonable team using only a single faction or affinity combination?