There are different techniques to cloning, I believe.
You could use the special power Clone Self, but the clones might trigger that.
Some other options would be the Attribute Accidental Cloning, and give it a trigger that is kind of rare. possibly trigger on enraged and give him the enrage special power. m25AI doesn't usually use that power, so you would be safer there.
You could also give him Private Army or Summoner, and make separate "clone" hero files. then you really do limit the number of clones.
You could also do something like a "clone bomb" make a projectile limey lure attack, and swap it to summon in the ffxcontrolcentre.