Hi all, you guys seem to have a real grasp on which flights are best so a quick question please. Any opinion on which RTW ticket would be best to get for these destinations below which I intend taking my family on next year?

I was thinking the One world explorer 3 continent one but every time I look at it online the flights aren't available for next year it seems and if I pick random dates this year it seems to be a nightmare tool and tells me route isn't possible and I lose all the data I put in without telling me what was wrong so I give up!

I guess if there are advantages in buying some of these flights separately I could do too..

Thanks

London 14/01/2018
Dubai 14/01/2018
Auckland 18/01/2018
overland to
Christchurch 06/03/2018
Melbourne 06/03/2018
overland to
Cairns 29/04/2018 need to do this flight to fly to Tahiti
Auckland 29/04/2018
Tahiti 30/04/2018
Los Angeles 05/05/2018
Los Angeles 21/06/2018
Jackson Hole 25/06/2018
overland to
Vancouver 10/08/2018
London 11/08/2018