You'll be receiving 100% flight miles + 50% class of service bonus + 100% AA Platinum bonus = 250% of actual flight miles. Hope that clarifies. You can go to PPT if you use the once a week QF operated flight. You won't be able to use the Air Tahiti code share.
BTW, where did you have your reservations made? I'm having mine done with BA Budapest direct, but so far I am a little concerned with their tendacy to be slightly slow in response. Since we're both doing similar bookings we might want to share some info on Budapest agents, mail me if that sounds good to you.
A few questions on routings: on your final leg, you're flying LON-DXB-LON-TLV. Are you stopping over in DXB and TLV? Correct me if I'm wrong, but I thought you are only allowed to make two stop overs from the continent of origination (except N.America), one each in the outbound and inbound sector. Plus, I thought you're only allowed to travel to middle east once in the Europe/Middle East continent.
Also, are you finishing your journey as an open jaw at TLV, or do you have a TLV-x/LON-BUD leg in the end?
Cheers.