Is my pfr here not large enough? Goal was to isolate MP2. What do we generally raise to in this situation?

PokerStars No-Limit Hold'em, $0.10 BB (9 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

BB ($14.50)
UTG ($1.45)
UTG+1 ($12.65)
MP1 ($2.35)
MP2 ($21.45)
MP3 ($9.20)
CO ($3.30)
Hero ($9.50)
SB ($9.95)

Preflop: Hero is Button with A, A.
UTG calls $0.10, 1 fold, MP1 calls $0.10, MP2 raises to $0.5, 2 folds, Hero raises to $2, 1 fold, BB calls $1.90, UTG folds, MP1 folds, MP2 raises to $21.45, Hero calls $7.50 (All-In), BB calls $12.50 (All-In).

Flop: ($38.75) 2, 2, 8 (3 players, 2 all-in)

Turn: ($38.75) K (3 players, 2 all-in)

River: ($38.75) Q (3 players, 2 all-in)

Final Pot: $45.7