I have a 50 Fire/MA
Some thoughts -
It works but I found I don't have enough slots to really fill out the secondary.
The Melee attacks are direct Scrapper ports so for a Blaster they are pitiful damage wise. Traditional Blaster Secondaries have double recharge time Melee attacks resulting in double base damage. Animation wise they are awesome. The Storm Kick is really nice.
Dragon's Tail is your active melee mitigation, since it is very reliable knockdown with a fast animation.
The Massive AOE debuff is really good, Reminiscent of something ICE might have.
The Build-up replacement is okay. Sort of a double defiance deal. Build-up is probably better for burst damage, but for just cruising and blasting its cool.
The Teleport Attack power is kind of awkward to use.
Oh the Teir 1 is epic, the whole repel animation of arms flailing as the baddies are sent away is fun.
I have found it a usable Secondary. But not as good as /Energy.