Party bonus exp not documented anywhere
There is no official documentation anywhere about Origins' non dual clienting party exp bonus system.
http://wiki.originsro.org/wiki/Experience The Origins wiki page on exp is not accurate. It is a copy paste of irowiki's page. It does not state any information on party bonuses or its mechanics with dual clienting (+20% exp per unique character in a party, bonuses disabled map-wide upon dual client detection for 10 minutes), and also it says taps give +25% exp bonus, when in actuality it is only +10% on Origins.