Villain is an average lag reg. haven't played with him too much and haven't been caught bluffing recently. Thought process revolves around ISF's theorem; my range is way stronger than his on this flop. I rep more straights, flushes, and sets.

is this a good spot to bluff or spew?

No-Limit Hold'em, $1.00 BB (6 handed) - Hold'em Manager Converter Tool from FlopTurnRiver.com

Button ($82.10)
SB ($320.15)
Hero (BB) ($100)
UTG ($194.40)
MP ($100)
CO ($106.90)

Preflop: Hero is BB with 7, 7
1 fold, MP bets $3.50, 1 fold, Button calls $3.50, 1 fold, Hero calls $2.50

Flop: ($11) 6, 4, 9 (3 players)
Hero checks, MP bets $8, 1 fold, Hero raises $22, MP calls $14

Turn: ($55) 4 (2 players)
Hero bets $22, MP calls $22

River: ($99) 5 (2 players)
Hero bets $52.50 (All-In)