Jousting is a medieval sport that involves two knights on horses armed with lances, charging towards each other. Referring to something as "most jousting" implies that it is intense, competitive, or aggressive. There are several synonyms that can be used to describe such a situation. One could use words like "fiercest," "most combative," or "most competitive" to convey the same meaning. Alternatively, phrases like "most ferocious" or "most incendiary" could also be used to describe the intensity of the situation. Ultimately, the choice of synonym will depend on the context and the tone the writer wants to convey.