Alright so theoretically if we were to grab the Ioun Stone and use it for the Bastard Sword, we could size up to a large Bastard Sword, make that an Impact Speed weapon, same everything else. We'd hit 64d8 damage per swing, averaged to 288, which if all our swings hit will reach 1,440 damage and we can do it all day long, spread out between 5 attacks in case you need to fight a few Balors at once.