reptile
The OP has stated that he has concluded that all ADRs faulty. He hasn't asked how to detect it. He just wants to know which one to switch off. My answer was once it is determined all are unreliable it doesn't matter which two you switch off. Because you keep one ADR on for stall warning only which comes from AOA probe and is the only thing valid. All other function from faulty ADRS are equally unreliable.
Also it is not necessary that ADRs will detect faults and give you specific warning. Then AF447 wouldn't have been such a disaster. You may simply have speed increase one side and decrease on other side even the AP and ATHR may not trip. A 320 captain has given his nightmare in the SIM with this problem where he badly stalled and lost significant height but still didn't realise it was unreliable air speed. you will do well to read that. This topic is discussed many times on the forum so no need to waste time.