Nah, Etan Thomas has a 7.5 mil contract that can be used to balance.
Larry Hughes will make over 13 million next year...
Al Harrington will make 10 million...
Mobleys contract is for 9 million...
Assuming Nate signs for something like 4 mil, that would be total of something in the area of 23-26 million...
Even if you did Cardinal (about 7 mil), Thomas (7.5 mil), and Rubio (less than 3mil), you'd still be of by about 6-10 million in salary. I'm not trying to argue, it just doesn't work under the salary cap...