Mandatory for ministerial training.
Odd that Koine, Aramaic or Hebrew was not mentioned among the qualifications in I Timothy or Titus. Like so many other things that are helpful they are not core. With today's electronic tools the language benefits can be largely gained with a program like BibleWorks, Accordance or Logos. A little grammar training and an expert scholar in your contacts folder is a great help. One of the best uses for seminaries is for graduates to occasionally use the scholars for their expertise to augment the other duties of a pastor/bishop.