Yo,
The stat build i use is simple
FULLHEAL all the way.
For summy there is no need for other build, cuz summy is al bout the fast killing.
U could say fast killing needs str, but no, it needs alot of heal, so u survive way longer and can land way more hits.
So requierements for ur wep, and the rest heal, not so hard ey ^^
have fun with da uber build =D