QTR-Quadtone RIP

I want to make a profile for an Epson R220 on EEM and using the MIS UT 
R2 inks. Now - because the (C, LC, Y) and (M, LM) inks are exactly the 
same - how do I set the limits for each? I want to use all the jets all 
the time to keep the jets in use and to alleviate possible microbanding. 
Do I simply divide the ink limits by 3 and 2 respectively and continue 
from there?

I would appreciate some guidance.

Reinier