I am aware that best practice questions are not always appreciated since there there's not "one size that fits all".
I am going to give a LaTeX introduction for phd students at my company. All of them are engineers.
For mathematical stuff I recommend to use the well known
amsmath package (link) and recommend not to use the standard math support of LaTeX.
I often look through the posts here in order to keep me updated about new developments and sometimes when a question is easy I try to help.
For the new LaTeX introduction I thought that I should mention at least the
mathtools package (link).
Do you think that it is Ok to recommend the
mathtools package instead of
amsmath package. The
mathtools package calls the
amsmath package and improves it as far as I understand.
What about the
empheq package (link)? Should I generally recommend this package? I don't understand if it's automatically loaded if one uses the
mathtools package (it says The empheq package is part of the mathtools bundle.).
fixmath package (link) still needed? Can I achieve the ISO conform formatting also with the mathtools
In order to have less trouble with available symbols and so on I would recommend to use the Computer Modern font. Are there other fonts which can be safely be used without running in too much trouble with the availability of symbols and font features like small caps and so on.
Do you have any further recommendations about good practice or "now you should use this and not that" regarding mathematical stuff?