Well that shouldn\'t be a problem. After typing /spawn one would have to wait a while for the Hydlaa map to load (which if I\'m not mistaken is the one for which you have to wait the longest time) and then rush to the arena (with yet another loading time). Once coming to the arena, there is still quite a long path waiting for one who wishes to come back.
Of course, the time would be shorter for those who load all maps while connecting, but still the fight shouldn\'t last more than one minute... Unless all fighters have (for example) high light armour skills and low weapon skills... But that isn\'t very likely to happen...