The left-hander, a formerly top-ranked batter in ODIs, has moved up three slots to seventh position after a match-winning 91 in the first ODI of their ICC Women's Championship series against England, while her aggregate of 111 runs in a preceding three-T20I series has lifted her two place
Miller has also recently captained South Africa (in a 3-match T20I series in August against England), and the Barbados Royals in the ongoing CPL season.
The matches against Australia on September 20, 23, and 25 and South Africa on September 28, October 2 and October 4 are India's final T20Is before the World Cup next month.
The series will kick off from September 20 onwards in Mohali. It will be followed by the second T20I in Nagpur on September 23 and the third T20I in Hyderabad on September 25
The T20I series will start on September 10 and will go on till September 15. The three-match ODI series will start on September 18 and will go on till September 24.
The 15-player squad and three travelling reserves will also make the trip to India ahead of the tournament for the three-match T20I series later this month
Chris Jordan (finger) and Liam Livingstone (ankle), will continue their rehab and will not tour Pakistan ahead of the World Cup but remain on track to be fit for the tournament in Australia.