X being the strongest algebralien is pretty normal since THEY ARE AN X they have no value AND ALL VALUE THEIR VALUE ISN'T SEVEN IT'S ANYTHING HECK IT COULD BE INFINITY SINCE THEY ARE A VARIABLE so their value can change meaning that they most likely can have the same powers for example in the episode where four teaches them how to revive and the tpot episod where they start shooting beams they most likely had a value of four or another algebralien with the same powers meaning that their powers would be of fours or like I said another algebralien(s) with the same powers, which also means that if my theory is correct they could easily just get the same powers as 2763 meaning that if they fight one, ONE WOULD LOSE
But hey that's just a theory a TPOT theory!!!