Return tickets (even if refundable) do not indicate a strong reason to return to the home country.Will a return ticket submitted along with visa application be strong enough proof for visa approval? I am thinking of getting a return ticket booked (Air Canada gives a ticket conditionally, that if visa is rejected, they will refund the money) on safer side. What is your take on that? However, the only trouble is that if we buy a return ticket then I need to pre-plan the trip right away. Otherwise changing date on the ticket is also expensive.
Your partner should focus on other strong ties: Employment + property/land ownership or a lease + good financial situation + dependent family members + previous travel history to visa-required countries, etc