I hate 3v1s!
But I love this game. Totally awesome.
I thought challenge 11 was bad. Then I tried convict.
Argh. C11 was much easier mainly due to one reason. His shield is either much better or the enemies attack much less. Anyway, I don't suffer guardbreak, much more than I can say for convict.
Haiz...shall go back and try again. Perhaps make the convict natural form slightly faster?
Also, there's a way to cheat on the battlefield arena. Hide in the bottom right, and they won't hit you.