Digital BW, The Print

I'm using an R220 with the MIS UT-R2 inkset, printing on matte paper (mostly PA205) with 
Eboni MK and the neutral set, except for the Y position where I've added a warm cart (to add 
a little warmth, as per Paul Roark's suggestion on his web site).  I'm still getting slightly cool 
low to -low-mids and shadows and was wondering what would be the next logical spot to 
use a warm cart in if I want just a bit more warmth?