Guild Wars Zaishen Challenges

I've been playing Guild Wars lightly again, mostly pursuing the Zaishen Challenges. Not to be confused with the challenge mission itself, Zaishen Challenges are threefold: Bounties, Missions, and Combats. Bounties are rewards for taking out specified bosses. Missions are rewards for completing story missions in any of the four Guild Wars campaigns. Finally, Combats are rewards for PvP actions, such as guild battles, Heroes' Ascent, or competitive missions. Aside from gold, faction, and experience rewards, one may be awarded Zaishen coins, used for all sorts of rewards, including the newequipment packs, a new slot to situation a pack that can hold armor or weapons. The challenges have been fun, since it's a good reason to go back and do old content for enhanced rewards, or to try stuff over in hard mode, since you get more coins that way.