Unless specified lists of common tools are either fairly equal in relevancy or may vary a lot in popularity in region to region.
In order to figure out which one is a good choice to invest in consider looking at the trends and cross referencing that with the job requirements in the region you want to work in.
It depends on the company and the position you want, some topics you need to have a high level of proficiency in while others only require you to have a working understanding of and which is which is mostly decided by your given situation.
A good rule of thumb is that core skills you need to know fairly well and remaining topics are useful to have a working understanding of.