This is tough…
But I would trade MSeal for one Quiver of Shadow.
Trading BPlate for Nil.
Unholy Staff for Marble Sword.
Kageboshi for CDirk.
Scholar Seal for Corruption Cutter (I stupidly fed it…)
Ogmur for Jugg.
Puri for Doom Bow/Sun’s Judgement.
Pyra for Sphinx or Nile
Prot for 2? CBow.
Omni for Sourcestone.
Cutlass for Doku, East Wind Waki or Leaf Bow.