Slumping botanical pattern mold and fighting Devitrification on smaller pattern mold

I continue to have a devit problem.  With the deeper pattern molds I have lowered the processing temperature and brought the hold tie way down low.  I can lower it even more and will try this when next I use the deep pattern mold.  But to begin today I am slumping an already completed piece.  I will use the following firing schedule:

200dph.............................1220 degrees.....................5 min
Full.....................................900 degrees.....................1 hour
100 dph...............................700 degrees....................Off

Once i finish slumping I am thinking of using the cherry blossom fuser again, with one layer of clear and then one layer of clear and red glass on top.  I changed my mind about using the red and clear glass.  Did another design of white mixed with a clear glass with red and brown and white stringers on it and I put clear glass as a base.  Thinking of full fusing the whole thing first and them putting it on the mold .  So I am full fusing layer of clear glass and another layer of several pieces(2pieces of white and one piece of clear with stringer glass) on the bottom.  I am placing it on the bottom to see if I can get a more fully fused piece with better lines.  Then after fusing I will put it on the cherry blossom mold and fuse that.

So I will be looking to see how the design and the mixture of the glass works when I put it on the bottom and full fuse it first.  Often when fusing a solid piece as the base and mixed pieces on top those pieces to not fit together very well and appear to have spaces.  Perhaps putting the mixed pieces on the bottom whilst fusing them will allow them to fit together better.  Tomorrow I will spray the cherry blossom pattern fuser and place the new double pieces fused today on top of it.  Lets hope it all works.