Well perhaps if you can give some specific dates we can give more specific advice? I found plenty of Main Cabin availability on 4, 5, 6 and 7 November when I gave up looking, basically only Friday 6 was sticky, being a Friday, and even then there was First available and indirect routes. You want to avoid non direct flights, it bumps up the Avios requirements. For the second week of November onwards, as already mentioned you may have to wait until the 331 day limit has moved on a bit. Getting to Hawaii on redemptions around Thanksgiving may also be difficult to do, for obvious reasons.