I can get double that in 30 minutes from my farm spot. I could grind an hour and have a full stack easy. I can also get 2-3 God chests in that time and get better rewards than I ever had in the small amount of PvP. That's an easy 20 marks, Who knows how much Xp, Glimmer and 2-3 public events rewarding me with possible materials. Not to mention the extra items from God chests.