He's representing a very thin range though. A3s (2), 55(3), 33 (1) for a total of 6 combo's.
Despite blocking some bluffs I still figure he can easily overbluff. Keep in mind he only has to bluff 3 combo's for a call to become profitable if his value range is 6 combo's.

Alright, there are few things to consider
1)this is not range cbet in theory (in practise obv fine, since people under x/r and play more straightforward)
2)on the turn he shoudlnt have raising range in theory, so here is deviate. What he can raise as a bluff 5x (well I dont know he honestly shouldnt have naked 5x except A5hh) flush draws (candidated A2/42/64/74/76; raising other fds a bit overkill)
3) river just a blank, now he have less bluffs as A5 got there and some of his FDs got pairs. Do you really see people here just blasting busted FDs?

p.s. I belive can mostly use smaller turn bet(from 40% to 80%) on paired runouts

The problem for me on the turn is that I am blocking a lot of his possible bluff combos with the Ad. Most of his other FDs are without SD value, so after flop call we can discount 42s, 64s, 74s, 67s, etc. Solvers never ever raise OTT, but in real life, I can easily imagine, he looked down his card, saw a 3x or 55 and said "now or never", just to deny checking behind OTR. The pool has a very low AF on the river, in general he could except a few bluffs on a blank river in this pool.