In this line they dont have enough Ax. So id call. In fact the Ax might be better for you as we have more A 6/5/J. I think our range is better on the river so it may be a very small 10% donk OTR with a lot of our range.

You should only really have QTcc because they would xback cc more often so it gives them more bluffs in their range having cc in our hand.

Honestly this line looks quite FOS, but looking on his stats I wouldnt not bluffcatch anything
This line by the way is super good to bluff but most people no idea about it and his sizings over the street inclined he have no clue about poker at all (not to bash anyone or anything, but over 99% of micro stakes player think they know something and try to mimic gto but in real life they just click buttons and justify it with solver outputs)

Hard to find natural bluffs since the board is full rainbow on Turn (not going to really have any BDFD semi bluffs). His natural bluffs are 43s, 87s, 97s and then there are air. In general, he is trending towards passivity with the WWSF in mid 30's (small sample).

It is probably close and can't blame you if you called. Make sure you note what he is doing on the @ 50% flop/@ 50% turn and @ 70% river line.