The ability to summon creatures can fight you in duel arena. It's 1v1 combat, but it is still labeled multi. Why don't they allow the same thing for RS gold other places like bounty worlds or PvP? It seems easy to me. P.S. P.S. You'll be hit with such speed that it's even funny if you only go with a friend into the multi-zone.
I've thought of an idea for making full use of the runecrafting guild tele tabs. These tabs will connect to the outside or guild inside the wizard tower. These cheap OSRS gold can be combined with other Teles in order to make bank visits quick, but the majority of Teles require magic lvls.