The Xillia crew includes a Badass Normal from another world, a girl with an overdeveloped mana lobe even Maxwell recognizes as a genius, a General who controls battlefields like conductors control symphonies, the daughter/student of a legendary staff fighter, and a pair of Physical Gods alongside their equally powerful human companions. Ludger kills them in the Julius Ending. ALL of them. Alone.
Considering that his alternate universe counterpart Victor also did the same thing in his world, that means Ludger killed the entire Xillia party twice over. Ludger may very well be the most powerful Tales protagonist to date.