RedPhantom, why not go through the remove unseen polys process?  That will not only relieve the poke-through, but it will also reduce polygon count in the bargain.   Combine figures and remove unseen polys kind of naturally go together.

     The process would remove the underlying doll's skin where it is covered by clothing.  You may need to fine-tune the poly selection near sleeve openings, etc.  It may be difficult to do for hair, so you might do a combine for everything except the hair, then remove unseen polys, then do a second combine with the hair.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5