PSG battled to a 2-1 win over Olympiacos on Wednesday night after being reduced to 10 men to claim their place in the knockout stages.
Zlatan Ibrahimovic's eighth goal of the European campaign had the hosts in the driving seat but the dismissal of PSG midfielder Marco Verratti just moments into the second half gave hope to the Greek visitors.
PSG nevertheless were wasteful with a number of chances to extend their lead and Olympiacos made them pay when Kostas Manolas levelled from a corner 10 minutes from time. However, there was still time for a winner and Edinson Cavani beat the offside trap in the final minute to fire beyond the helpless Roberto.
Blanc was pleased with the attacking mentality shown by his side in the win.
"This is the second time after the game in Marseille (2-1), which demonstrates the value", Blanc told L'Equipe.
"This desire to move forward and not to preserve the score allowed us to win.
"This requires a huge burst of energy but we know we can rely on this value . That is good.
"Right now, we're on a cloud. If we continue like this, I do not see very many people who we can worry about."
Even though PSG made sure of their qualification, defender Gregory van der Wiel was a bit more measured than his manager.
He said: "We really playing well this season, it is true, but we can always do better. And I think we can still do better than last season.
"It's been a little complicated but we got there and it is a great satisfaction. It was the ambition in this Champions League.
"We want to go as far as possible but first try to proceed step by step.
"The next thing is to know who the other qualified teams are and we hope that the draw is merciful."