According to Relience Ratings, the latest rankings are as follows:
1.PAKISTAN
3.SRI LANKA
4.ENGLAND
5.AUSTRALIA
6.WEST INDIES
7.INDIA
8.ZIMBABWE
10.Afghanistan
The highest total by a team in T20 international cricket is 278/3 by Afghanistan against Ireland in 2019.
246-6
england
Highest T20I score is 260-6 for Sri Lanka against Kenya in 2007 T20 World Cup in South Africa.
258 by sri lanka in 1st T20 world cup
200
Brendam McCullum
pakistan
Deandra dottin
Aaron Finch 156
yusuf pathan
Mumbai indians