Well played drewks. You know I can't resist a tactical discussion. 
Anyway, the best option is Gamboa especially if Liverpool have Sterling and Moreno on their left wing (that's if they play a 4-3-3 or 4-2-3-1) but it actually wouldn't surprise me if Mr Irvine plays Baird at right back for 'safety reasons' given that we are the away side.
Anyway, the best option is Gamboa especially if Liverpool have Sterling and Moreno on their left wing (that's if they play a 4-3-3 or 4-2-3-1) but it actually wouldn't surprise me if Mr Irvine plays Baird at right back for 'safety reasons' given that we are the away side.