We have two build slots available on a regular basis, one is blocked by the Guild Challenges and the other we currently use for +15% Karma for 24hrs.
So we would like your feedback on whether you would prefer to keep the karma booster in one slot or go for something different; these are the options we have:
+5% Kill Experience for 24hrs
+10% Magic Find for 3 days
+10% Gathering Bonus for 48hrs
+15% Karma for 24hrs
+10% Crafting Critical Success for 24hrs
+5% Increased Gold for kills for 24 hrs
They all have their plus points and weak points, so I'll leave you to argue it out.