Leinster stepped it up in the second half against 14-man Bath to take a bonus-point 47-21 win.
Alfie Barbeary crashed over after just a minute of play for Bath Rugby against Leinster Rugby at the Aviva.
Tom de Glanville then added another with less than 10 minutes on the clock to stun the hosts, before two tries from Robbie Henshaw got them back in the game.
But Bath hit back on the stroke of halftime as Ollie Lawrence sliced through and offloaded out the back to De Glanville for his second, and Finn Russell added the extras from out wide to put them 21-19 up at the break.
After a double from Robbie Henshaw and Jack Conan kept the hosts in it in the first half, RG Snyman bagged a brace in the second 40 along with tries from Jamison Gibson-Park and Garry Ringrose to make it 47-21 at full time.
Leinster finished top of the pool, while Bath will continue their journey in the EPCR Challenge Cup after finishing fifth.
Scorers:
Leinster Rugby: Tries: Robbie Henshaw (2), Jack Conan, RG Snyman (2), Garry Ringrose, Jamison Gibson-Park. Conversions: Sam Prendergast (3), Ross Byrne (2).
Bath Rugby: Tries: Alfie Barbeary, Tom de Glanville (2). Conversions: Finn Russell (3).
Teams
Leinster Rugby: 15 Hugo Keenan, 14 Garry Ringrose, 13 Robbie Henshaw, 12 Jordie Barrett, 11 Jamie Osborne, 10 Sam Prendergast, 9 Jamison Gibson-Park, 8 Jack Conan, 7 Josh van der Flier, 6 Max Deegan, 5 James Ryan, 4 Joe McCarthy, 3 Rabah Slimani, 2 Rónan Kelleher, 1 Andrew Porter. Replacements: 16 Gus McCarthy, 17 Cian Healy, 18 Thomas Clarkson, 19 RG Snyman, 20 Caelan Doris, 21 Luke McGrath, 22 Ross Byrne, 23 Jimmy O’Brien.
Bath Rugby: 15 Tom de Glanville, 14 Joe Cokanasiga, 13 Ollie Lawrence, 12 Max Ojomoh, 11 Ruaridh McConnochie, 10 Finn Russell, 9 Ben Spencer (captain, 8 Alfie Barbeary, 7 Miles Reid, 6 Ted Hill, 5 Ross Molony, 4 Quinn Roux, 3 Will Stuart, 2 Niall Annett, 1 Beno Obano. Replacements: 16 Tom Dunn, 17 Francois van Wyk, 18 Thomas du Toit, 19 Charlie Ewels, 20 Josh Bayliss, 21 Louis Schreuder, 22 Orlando Bailey, 23 Jaco Coetzee.