What would be the criteria for selecting the top 6 teams?
If we go with the rankings, I don't think Pakistan would make it and Sri Lanka-Windies will edge Pakistan.
Let's not focus too much on the current rankings. They will change. If we look at the performance for the last 4-5 years, then there is no comparison between Pakistan and weaker teams such as Sri Lanka and West Indies. 1-2 years of performance should not be used to promote or relegate any team in the test cricket system. Given the complexities of this format, we should take a minimum of 5 years. And apart from performance, the financial strength of the cricket boards also need to take into account.
If financial strength is a concern then Proteas and Kiwis should stop playing test format. It might surprise many but BCB is richer than CSA and NZC (Even SLC, ZC and CWI are richer than NZC).
These are the numbers of 3 WTC cycle. The 2023-2025 cycle is going on...
Pakistan 2019-21 : 12 M 4 won 5 lost 3 draw
2021-23 : 14 M 4 won 6 lost 4 draw
2023-25 : 7 M 2 won 5 lost
Total : 33 M 10 won 16 lost 7 draw
Srilanka 2019-21 : 12 M 2 won 6 lost 4 draw
2021-23 : 12 M 5 won 6 lost 1 draw
2023-25 : 8 M 4 won 4 lost
Total : 32 M 11 won 16 lost 5 draw
Windies2019-21 : 13 M 3 won 8 lost 2 draw
2021-23 : 13 M 4 won 7 lost 2 draw
2023-25 : 9 M 1 won 6 lost 2 draw
Total : 35 M 8 won 21 lost 6 draw
Bangladesh2019-21 : 7 M 0 won 6 lost 1 draw
2021-23 : 12 M 1 won 10 lost 1 draw
2023-25 : 7 M 3 won 4 lost
Total : 26 M 4 won 20 lost 2 draw
* Sri Lanka produces better results when compared to Pakistan and are marginally ahead in performance. Lately, their stocks are going up because of good performances
* Windies and Bangladesh are equally shit, although the emergence of fast bowling in Bangladesh camp creates some hope and in recent times their stocks have been in an uptrend but need consistency and good leadership.
* Similarly Pakistan stocks are all time low on all fronts. Worst home season results due to braindead policies of PCB, Depleted and tiring seam attack due to fitness and lack of work management, Virtually nothing to show in the Spin department and camps within players which is not a healthy environment for any team sport. They rarely turn up for competition in SENA, unless it's English conditions.