ok,
i think M&M , and A3 are the best FFP's for accural.
US and TK have better spending rates.
I already have US accounts ( never credited any flight, only use them for to buy miles when them run promos ).
I will ask for a status match with A3 and TK and credit my *aliance flights, where I get the best deal.
May be also open a M&M account and credit some flights there, if using the lounge benefits on TG Y domestic flights with a matched A3/TK card.
Should pic benefits from all FFP's.