PokerStars - $100+$9|250/500 Ante 60 NL - Holdem - 9 players
Hand converted by PokerTracker 4: http://www.pokertracker.com

UTG+1: 8.7 BB (VPIP: 16.50, PFR: 6.10, 3Bet Preflop: 2.40, Hands: 311)
MP: 31.95 BB (VPIP: 16.60, PFR: 11.62, 3Bet Preflop: 4.89, Hands: 735)
MP+1: 28.45 BB (VPIP: 15.31, PFR: 11.54, 3Bet Preflop: 6.47, Hands: 300)
MP+2: 49.87 BB (VPIP: 19.49, PFR: 15.62, 3Bet Preflop: 6.17, Hands: 942)
CO: 17.58 BB (VPIP: 17.80, PFR: 14.83, 3Bet Preflop: 4.27, Hands: 760)
BTN: 29.11 BB (VPIP: 28.85, PFR: 16.67, 3Bet Preflop: 4.35, Hands: 105)
SB: 30.43 BB (VPIP: 14.03, PFR: 10.23, 3Bet Preflop: 4.10, Hands: 503)
Hero (BB): 22.53 BB
UTG: 24.93 BB (VPIP: 15.88, PFR: 10.54, 3Bet Preflop: 4.09, Hands: 360)

9 players post ante of 0.12 BB, SB posts SB 0.5 BB, Hero posts BB 1 BB

Pre Flop: (pot: 2.58 BB) Hero has Jc 8c
fold, fold, fold, fold, MP+2 raises to 2 BB, fold, fold, fold, Hero calls 1 BB

Flop : (5.58 BB, 2 players) Ts Kd 9h
Hero checks, MP+2 checks

Turn : (5.58 BB, 2 players) Qc
Hero bets 2.53 BB, MP+2 calls 2.53 BB

River : (10.65 BB, 2 players) 7h
Hero bets 4.58 BB, MP+2 raises to 45.22 BB and is all-in, Hero calls 13.3 BB and is all-in

Villain is a reg. If we assume he is never bluffing, we need to call 6659 to win 16551/2, so we are getting 2.5 to 1. Would you approach this spot by counting how many combos of AJ he has vs how many non ace Jx, and see if we are getting good enough odds? If that is the case, my call should be correct, since we are getting back half the pot more than 30% of the time. Or am I missing something?

I am assuming he shoves any Jack, since it's very unlikely that we have AJ ourselves due to the stacksize.