I dont know if you guys are doing this, though in the cell saga when Tien used Tri cannon, he looked through his hands that showed a zoomed in imagine, - i THINK, its been a long time -. So, my idea is that in the corner, if possible, a small window showing a 200% zoomed in view of the target. (good for hitting enemies who are so far away, im sure you've all had problems hitting that guy against the sky who is sooo far away. the attack itself coudl be a very VERY fast wave like beam of energy that if hitting (without being blocked or whatever) knocks the opponent back hard and deals medium or so damage. should have small charge time, as used against cell.
i just think it would make him Truly unique and special (and dont bother buddying him, hes kick ass on his own, just have him power up, sure its boring, but its less work for one, and hey, your showing a tien who needs no damn help!) sorry if you guys have decided things about this already - i havnt read all too much on this thread, its just my 5 cents.