Yes of course but lets not forget that Xizor and Traya are not inseparably attached to their bases of operations. Traya can leave Malachor V (*gasp*) and come for Kun directly. As in, face him on Yavin 4. How does she do this you may ask? Well of course Kun is stronger than Traya. But is Kun stronger than Traya + Sion + the Three Sith Lords of Nadd's tomb? Plus some acolytes an assassins?
I thought you said that the combatants, couldn't leave their bases? Or at least that is what I recall seeing on one of the threads..