Welcome to Jordan and RJ!
The best way to spend RJ miles is on OW partners.... not only because the RJ own metal taxes/surcharges are crazy, but because there are some really good OW deals.
The RJ partner awards are indeed often cheaper if booked as 2x one way. Don't ask me why, they just are
There is currently no option to book a pather award via the booking engine. You have to fill in the form, or write an email (they are really quick in responding) and wait for them to reserve the seat. Since you will be in town, it will be much easier to drop by the Royal Plus office @7th circle. The FF staff there are great.