I think Todorov has to play at some point in this game, he brushed 3 Airdrie defenders aside as if they weren't there, and QP have solid defenders which we've struggled against, he could be key to us opening up their defence. Cadden and Mullin would also be important, getting down the wings and getting balls into the box, in our last game at Hampden we rarely used the width of the big pitch to get in behind them, and the one time we did whip in a decent ball Mullin got on the end of it and scored (although the incompetent Lino ruled it offside).
I'll wait till the end of next week before making my prediction, struggling to see us coming away with a win against them so need a few days to let my optimism build up enough for me to predict a Livi win.