The Wild Mage Mod must be already be installed in order for this patch to work correctly.
The Overland Preservation Mod is not required and will conflict.
After installing the merged Patch scripts, you may then have to re-compile whichever default spell scripts included with the Wild Mage Mod you want to Persist on the Overland Map.
Then again... you may not. Logic indicates you would, but circumstancial evidence indicates you don't.