Digital BW, The Print

I need the benefit of everyone's collective wisdom.  I'm using the 
Epson UltraChrome inkset and both IJC/OPM and QTR to build profiles.  
I like having a totally neutral profile, along with cool, warm, sepia 
and selenium profiles.  

I have heard here and there (though I have not confirmed this) that 
the Epson Yellow pigment inks tend to cause more metamerism (and 
perhaps more bronzing as well) than most of the other inks.  My main 
concern is metamerism when viewing prints under different lighting 
conditions.  

It seems many of the QTR profiles use only K, LK, LC and LM to build 
the neutral and cool profiles.  They also use only K and LK to build 
warm profiles, with Yellow being reserved only for sepia profiles, 
where yellow is unavoidable.

Anybody have direct experience or recommendations?  

I'd appreciate any insights or links to in depth information.  I want 
to get the best our current tools have to offer, using the UC inkset 
for now.  

Lou