Spirit Women won the toss and elected to field first, restricting Barmy Army Women to 135-5 off their 20 overs.
West Indian Shemaine Campbelle top-scored with 33* off 25 balls while Kavisha Egodage made 30 and captain Lauren Winfield-Hill 22.
Dottin, who controversially missed the recently concluded WPL, made eight as Mahika Gaur and Betty Chan took two wickets each.
Then, thanks to 40* from captain Nicola Carey and 35 from Sophia Dunkley, Spirit Women needed juts 18.2 overs to reach 138-6.
Tara Norris took 2-34 off her four overs while Rumana Ahmed took 2-21 from her four. Dottin also bowled her full quota of overs, finishing with 1-33.
First, Dottin smashed an impressive seven sixes as well as three fours on her way to a top score of 69 off 48 balls to help the Barmy Army post 163-6 from their 20 overs after losing the toss.
Bangladesh’s Rumana Ahmed chipped in with 37 as Scotland’s Kathryn Bryce took 2-24 off her four overs for the Warriors.
Dottin’s form with the bat then carried over to the bowling crease where she bowled three economical overs, conceding just nine runs and picking up a pair of wickets including that of current West Indies captain Hayley Matthews who made 28.
Bryce top scored with a 26-ball 45 as the Warriors were dismissed for 146 from their 20 overs.
Taylor won the toss and elected to bat first, scoring her 61* off 48 balls and hitting 10 fours in the process to help her team post a respectable 150-4 off 20 overs.
Stere Kallis and Dane Van Niekerk also provided valuable contributions of 37 and 28, respectively.
Their total, however, proved to be not enough in the end as Spirit Women needed only 15.4 overs to reach 155-4. Captain Nicola Carey led the way with a magnificent 28-ball 84* including seven fours and seven sixes. Natthakan Chantham also made 35*. Aliya Riaz took 2-15 from three overs for the Tornadoes.
Taylor’s Tornadoes finished last in the six-team table with two points from five games.
The West Indies all rounder top-scored with 24 to help the Tornadoes post 115-5 off their 20 overs. Sterre Kallis (19) and Aliya Riaz (19*) also had meaningful contributions. Pacer Shabnim Ismail took 2-8 off four overs for the Sapphires.
Winifred Duraisingam (3-8 off 2.2 overs), Sita Rana Magar (3-17 off four overs) and Chanida Sutthiruang (3-22 off four overs) then combined to restrict the Sapphires to a modest 60 all out in just 14.2 overs.
