interesting feedback - cheers. I'll post my reasoning for preflop and donk turn = I'm obviously questioning my reasoning now though.

preflop
1 - pretty sure villain is playing from a chart
2 - chart will say 3b AK, villain won't know why, but will often fold AK vs an ep 4b
3 - KK ain't folding pre, nor is AA. KK isn't folding postflop either, unless the board comes Axx - which isn't that common cos i hold two aces
4 - villain is c-betting 100% when checked to on any flop

c-c flop, donk turn ideas

1 - he folds KK vs a c-raise, probably continues with AK? not sure
2 - villain doesn't have the nuts, cos i do = reads say he shuts down on the turn
3 - betting turn small may get him to put me on flush draws and small pairs and AQ, which he raises with AK and maybe even KK. If i size it small enough i doubt he can fold anything, ever.
4 - If he just calls a $4 bet on the turn it means a pot of about $19 with about $16 behind on the river, which isn't a bad spot to be in.