Hello,
We have received the requests to start this event all over again so more players will go to danaria. That is not solely our decision.
Regarding the class difference, this is how it works for everything. If you farm some mobs, you can get the same problems in mage<->assassin/ranger. And these classes are just supposed to be unexpected, aren't they? This is made by the game creators (which are NCSoft), this is their "role". Not like we're defending them, it is just true. Mage classes have some more controle skills on the other side.
Making the boxes open with cast will bring a lot of complains about getting hit just once and losing the chest cuz of it.
The loot is always received by the side dealing the most damage, it is not only about the boxes. It also concerns monsters, bosses and so on.
You can also find a group if you do not like being 1 against a team.
So, everyone have equal conditions here.