If you want to be split in 3 indefinitely, here is how to achieve this (obviously this might get fixed, but maybe not because I don't think this "bug" is a dps gain):
1) Send a clone at a NON-BOSS dummy, then Paralyze the dummy, which causes your copy to stop auto-attacking (due to the buggy state of the spell, the clone will actually not stop auto-attacking fast enough, and will break your paralysis anyway and then stop attacking...). Once paralysis is cast, the clone will just come hang out with you and auto-assist you.
2) Select ANOTHER NON-BOSS dummy, send your second clone at it, and cast paralysis. You are now split in 3 permanently until you cast the spell again or cancel it. This even allows all 3 of you to attack the same target, but this is not much of an exploit, since the copies do not copy your special attacks (they only copy special attacks if they are on a different target than you, well except for spinning crane kick, which they always copy).
Anyway, enjoy... I really hope this spell doesn't get scrapped because it's really freaking complex, but also incredibly fun and a huge PvP buff as well. Sending your copies at healers to keep them from drinking is awesome, and splitting in two single target might also be worth it since your copy attacks from behind, and so does not get dodged or parried. Overall, this spell is one of the coolest things in the game, so let's hope blizzard doesn't give up on it due to the tons of bugs.