Without the reads as played I would call, if villain is raising PF with AT+, cause in that case we are often good and only 2pair combo that is possible is A6s (I saw the hand, so I know that villain is stupid, but never would have give him combo of K6o, not even K6s, not even A6o) and set of 6 that he would play this way. I also believe that he would play flushdraws this way, and to this range you are in OK shape, cause we only need to be good about 33% of the time.
But I also agree with silv3r923 that I would just call his donkbet, and if he is bluffing, let him and reevaluate OTT.
