This does not address your question, but I'll make a suggestion.
Lots of ways to trim out doors, and I'm not suggesting these specific moldings, but note how the head casing (your valance), aligns with the side casing and there is a fillet separating the head and side casing.
As an alternate, consider a thicker head piece that overhangs the side casing and extends past it a bit less than what you have now.
This shows a shorter head casing of 4 1/4". Proportions are important and using other than standard materials -- 1x4, 1x6 etc will often result in a better look.
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advice for head casing if we don't use a crown
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