To me a pastor needs at least a working knowledge of Greek.
In school when I went or where I went, the school pushed Hebrew more than Greek. But to get out of seminary one had to have both and many took a full course in Arabic. The language professors pushed the importance of the study.
It must have been 6 to 7 years after I was out of school doing some work with the Air Force folks in San Antonio. We were having Bible and doctrine study with them and came across a man in Houston that taught in church right out of the Greek and Hebrew. His name was BobThieme, Jr., he was way different. Somethings he was very good on and something I just got lost. One can do a lot of good and bad reading on him, colonel Bob Thieme, Jr.
Some of the church works that have caught my eye or God used greatly, I don't think most of their pastors had any Hebrew or Greek, but God used them greatly. Some times I think we push school and seminary to keep professors working, part of that is tongue in cheek and part is how I see it.
However any education used to the glory of God, will be a mighty work in God's eyes or that is how I see it.