And while Leinster were going hammer and tongs with the Warriors on Saturday night, Ulster were in the middle of a two-week build up to the Twickenham showdown having failed to qualify for the knockout stages of their domestic competition.
But Jennings, who is preparing for his fourth Heineken Cup Final, admits it's simply a guessing game when assessing whether it's better to be playing every week or enjoying some rest ahead of the big day.
"It's hard to know, I'll tell you next week!" said Jennings, who lost the 2007 Heineken Cup Final with Leicester Tigers before tasting success with Leinster in 2009 and 2011.
"I've been in situations where we've played against teams who've had a couple of weeks off and won Heineken finals and I've played in situations where you've played week-in, week-out leading up to finals and won.
"Personally, I like to play and I think a lot of the lads like to play as well."
Jennings may be unsure of what constitutes the perfect preparation but he is certain that Leinster will have to improve on Saturday night's showing if they are to claim back-to-back continental crowns.
Only the Leicester side of 2001 and 2002 have picked up successive Heineken Cups but Leinster are on the verge of surpassing that achievement with three titles in four seasons.
Leinster weren't at their best in the league semi-final, however, and Jennings insists only an improved performance can prevent their European quest being halted at the last hurdle.
"We need to improve on a lot of stuff," added Jennings.
"They're physical at the breakdown and hopefully we can pick up on a few things, learn from our mistakes and that will benefit us going into next week.
"Whenever you see, not just Leinster do well, but when you watch other teams do well it's always the ball carrier who makes an initial bust, you're immediately on the front foot and defenders are chasing their tails.
"That will give us confidence, we've shown we can do it but we've got to show we can be more consistent because the defence we're coming up against next week is going to be an awful lot tougher and they can defend for phases upon phases. Being honest on the ball carrier and being honest on those first two guys into the ruck.
"We were a bit all over the shop at the start of the second half but then we got a couple of phases together and we looked very sharp. We scored a good try and felt a little more relaxed and a bit calmer but we didn't close it off and they came back at us.
"We'll take some confidence from the game and we went through some of the patterns we wanted to but it was so scrappy. We need to sharpen up."