Advantages of this technique is that it takes on two forms and doesn't stay as the same three tomoe all the way through but explodes into something bigger, it is even able to take out summons the size of gamabunta if used correctly.
Though there are disadvantages to the technique, the hand seals and the prep time may be a problem to some users, you just need to use it at the right time and not whenever you can. Also the fact that when it comes into contact with an object it will explode into the pillar of lightning, so you can't use it to counter an attack and proceed to attack the opponent.
If I have a clone, or actually I might not need a clone, I could use this attack in conjunction with earth spikes, For example; If I somehow get behind the user I could throw this at them, my clone which would be in front and keeping them busy would use earth spikes so that the opponent might dodge by jumping into the air and the tri-tomow hitting the spikes straight after and sending an electrical beam into him and bleh OR the opponent uses nagashi to kill the spikes but the tri-tomoe would just got through being stronger and bleh him again.