Gaby Lewis scored a Player of the Match unbeaten 93 as Phoenix beat The Hills by 16 runs (DLS) in a rain-affected final at Sydney Parade.
The Irish international's 49-ball innings included 13 fours and three sixes, sharing stands of 59 in 50 balls with Nevedha Saravanarajan (16) for the first wicket, and 77 in 46 balls with Alice Tector (15*) for the second.
Tara O'Brien was The Hills' only wicket taker as Phoenix finished their abbreviated innings on 136 for 1 in 16 overs.
DLS adjusted the target up to 148, and the Fingal side made a brave fist of the chase, before falling 16 runs shy.
Hills skipper Jane Maguire battled bravely, top-scoring with 55 from 40 balls (4 fours, 1 six) as she put on 55 for the second wicket with overseas player Tahlia Dunne (31), and 50 in just 5 overs with younger sister Aimee (15*).
The required rate just became too much, with three wickets falling in the final over - Zara Craig taking 2-9 as The Hills finished on 132 for 5.
SPRINT COATINGS LEINSTER WOMEN'S SENIOR CUP FINAL
At Sydney Parade, Phoenix beat The Hills by 16 runs (DLS)
Phoenix 136/1 (16 overs; Gaby Lewis 93*)
The Hills 132/5 (16 overs; Jane Maguire 55, Tahlia Dunne 31; Zara Craig 2-9)
Player-of-the-Match: Gaby Lewis