i have a network of about 60 users and 12 of the users have rb133 in wds mode
what os version is best to run on them as all other rb411
rb600 boards run fine v3.24
and anyone advice me
Ummm, not true at all.All RouterOS versions can be used for different purposes. Sometimes a feature or two don't work. So big deal - test and see if it works. See in the forums that nobody is complaining about serious problems with 3.24 and 3.25. It could easily work for your configuration, for the features that the network is using.
Later - post your results and contact support if you find something does not work.