Travelling with my partner. Aeroplan PY Lowest booking.
Unfortunately had our PNR split as only I was upgraded on our outbound (I still think that how that works is ridiculous...)

For the return (J5 R0), wondering what would offer best chances of upgrade or highest priority? She's 35K for what it's worth.
1) I (SE), make her nominee, and request upgrade in advance.
2) I (SE), request @ airport day of departure.
3) Use status pass for her new PNR, and then either of above options or have her use her own credits?