How much to bet.

Villain is like 40/20 donk, I've seen him minraise/call my 3bet preflop with A4s and minbet the river when he it a 4 (I had AK and chcked down nothing)

PokerStars No-Limit Hold'em, $4.00 BB (8 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

Button ($417.05)
SB ($306.80)
BB ($40)
UTG ($368.90)
UTG+1 ($327.85)
Hero (MP1) ($398)
MP2 ($342)
CO ($400)

Preflop: Hero is MP1 with Q, Q
1 fold, UTG+1 raises to $8, Hero raises to $28, 5 folds, UTG+1 calls $20

Flop: ($62) 10, K, 8 (2 players)
UTG+1 checks, Hero checks

Turn: ($62) 4 (2 players)
UTG+1 checks, Hero bets $44, UTG+1 raises to $88, Hero calls $44

River: ($238) 2 (2 players)
UTG+1 checks, Hero bets

Against the same guy, this time we're a bit deep.

PokerStars No-Limit Hold'em, $4.00 BB (7 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

MP1 ($392)
MP2 ($400)
CO ($402.25)
Button ($332)
SB ($817.90)
Hero (BB) ($601.95)
UTG ($430)

Preflop: Hero is BB with 7, 4
5 folds, SB calls $2, Hero checks

Flop: ($8) 5, 8, 6 (2 players)
SB bets $12, Hero raises to $52, SB calls $40

Turn: ($112) 6 (2 players)
SB checks, Hero bets $92, SB calls $92

River: ($296) 10 (2 players)
SB checks, Hero bets

Guy is a 68/0/.5 donk. Note I have a bit over potsize on river

PokerStars No-Limit Hold'em, $4.00 BB (9 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

Button ($813.35)
SB ($177.60)
BB ($570.65)
UTG ($398.10)
UTG+1 ($213.10)
MP1 ($501.50)
MP2 ($80)
Hero (MP3) ($398)
CO ($365.50)

Preflop: Hero is MP3 with 3, A
4 folds, Hero raises to $12, CO calls $12, Button calls $12, 2 folds

Flop: ($42) A, K, 3 (3 players)
Hero bets $28, 1 fold, Button calls $28

Turn: ($98) 7 (2 players)
Hero bets $76, Button calls $76

River: ($250) J (2 players)
Hero bets

Villain is a very solid 19/15 regular. He stays out of my way a lot because I'm 14/10 nit. I can represent a few hands here so raise to what?

PokerStars No-Limit Hold'em, $4.00 BB (8 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

MP2 ($366.50)
Hero (CO) ($400)
Button ($145.35)
SB ($450)
BB ($419.70)
UTG ($519.10)
UTG+1 ($86)
MP1 ($498.80)

Preflop: Hero is CO with 10, K
4 folds, Hero raises to $12, Button calls $12, 1 fold, BB calls $8

Flop: ($38) 6, 9, Q (3 players)
BB checks, Hero bets $24, 1 fold, BB calls $24

Turn: ($86) 3 (2 players)
BB checks, Hero checks

River: ($86) 7 (2 players)
BB bets $56, Hero raises to