reward usage/best fare quiz

ok a little brain teaser for those who like these fare challenges
I have
3 amex EC-PE vouchers
1 companion voucher
15600 miles
19800 flying COMPNAY miles
need to get wifey MCO-MAN in early May next year
she will be flying with her Aunt (who could pay whole ticket unless I can use anything to help her).
they have to travel together in the same class
so on the MCO-MAN leg I would prefer to try and get her in PE
on the return its EC as her mum will also be with them
any thoughts ?
I think best option may be a combi fare using miles out and pay return ...could I then use the upgrade vouchers ??
TIA
I have
3 amex EC-PE vouchers
1 companion voucher
15600 miles
19800 flying COMPNAY miles
need to get wifey MCO-MAN in early May next year
she will be flying with her Aunt (who could pay whole ticket unless I can use anything to help her).
they have to travel together in the same class
so on the MCO-MAN leg I would prefer to try and get her in PE
on the return its EC as her mum will also be with them
any thoughts ?
I think best option may be a combi fare using miles out and pay return ...could I then use the upgrade vouchers ??
TIA