The French hit-man returned from a five week injury lay-off to shine in the last half hour of Saturday's 2-0 win over Inverness.
Darche said: "It was good to get back on the pitch and I am ready for Barcelona, even if I am not 100 per cent. It's so important for us to start the game well and to make sure we keep the ball - we need to play with our heads.
"If we do that, it is possible to get a good result. The team has achieved great things so far, but it's only half-way."