Hit 67 and have a free main slot to use for any of the ones I do not have, along with an extra ninja or two and more summons. :)
Only problem so far with:
Guy - PShuardo - MBlade
X - X - X
WB Asuma - X - X
is Hinatas, I generally aim for the enemy main with Talent 1 & Pain but sometimes I can take too much damage and get worn down quickly.