Does the parcel data have the unit elements broken up in to separate fields? If so then if you have version 10.3+ you can use the US Address - Single House Subaddress style to create the address locator then geocode your table of addresses that have the full address "910 Main st ste 220" in a single field against the parcel based locator. Based on your reply back to Joe I wasn't sure how either the parcel reference data or input address table were formatted. A screen shot would clarify this.
Had the original post been more current I would have replied much the same way you did with respect to the new locators now available. Goodness... Six year ago; how the time gets by us....