Solid analysis of the hand rpm. I think your best line versus these villains is to b/f flop since you can get value from TT-KKd. If villain c/c's flop and leads turn/river you can be pretty sure you are beat (i.e. there are a lot more Ax than missed draws)

Lately I've also been defending pretty wide in position to 3bets in multiway pots. However A6o has a lot of reverse implied odds and basically no drawmaking potential -- even with a fish in the pot I'm not sure defending is +EV