Getting a Rigged Poser characters into Blender there are a few different work arounds you can use to get them to work Blender can usually import FBX from Poser as long as you make sure you you turn off IK zero your figure and export as FBX also have found that the Alembic works rather well also now going from a rigged Blender character to  Poser presents a number of issues the primary one is Poser's native scale is based on inches but even then it does not seem to conform naturally with other 3D software If I recall right the Maya and Cinema 4D FBX workflows with Poser seemed to work the best but this is going back to the Poser Pro Game Dev version. I do not do much Rigging but when I export FBX from Blender into Poser in Blender's export options I only select the minimal things I need for the character itself see screenshot below other than that which is a bit time consuming is rigging the character in Poser itself.  I have looked at the product you that is available on Blender Market I can not speak if that would help or not it looks promising but have no experience with. I am sorry I know I probably did not answer your question but hope that the general info helps to some degree.

Lobo3433

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