Is this a 2" wedge? If so a 1.25" with shorter light path would likely be needed. I'm not sure I'd want to put the Barlow or Powermate before the wedge as it will take all the concentrated energy before it is diverted by the wedge.
I'm not familiar with the Quark light path requirements. Is there an energy rejection filter at the front of the objective for it? If not then its the same as what you're proposing. Perhaps some solar gurus can chime in.
Edit: If in doubt check the instructions. I found this in the Baader instructions for their solar wedge:
"4. When using auxiliary optics (barlows, telecompressors, etc), always place them into the beam behind the
Herschel Wedge - not ahead of the Herschel. Any optic placed ahead of the Herschel would be exposed to
unfiltered solar energy and most likely will be damaged by the potential heat buildup"
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