Denton made his Scotland debut against Ireland in August last year and got his first competitive action in the RBS 6 Nations. The 22-year-old feels that taste of the big occasion will be crucial before the Aviva Stadium clash in Dublin after helping through the quarter-finals.
"I felt that little bit more experience I had helped me be more mentally prepared and calm before the Toulouse game, which is very important," he told his club's official website.
"You don't want to feel out of your depth, as soon as you do that, that's when you make mistakes. I feel in a good place right now and I think that's showing in my performances."
He added: "Before a big game you can end up going on the pitch mentally exhausted and you don't want that.
"This season, being my first Six Nations, it has been very important to keep a lid on that. You have to make sure there is the right balance of mental preparation."
Denton is sure RaboDirect Pro12 strugglers Edinburgh can cause an upset against Ulster, despite suffering two heavy defeats against them in the league this season.
"Ulster are on of the best teams in Europe at the moment," he said. "They are a very strong team with some very big names.
"There is no question how tough it is going to be. But Toulouse are one of the best teams if not the best in the world in terms of history and depth of playing ability.
"It will be tough but we will be up for the challenge."