The phrase "great tactician" refers to a person who is very skilled at making smart and strategic decisions, especially in difficult or challenging situations. Full definition
I know we have other great tacticians like Jose Mourinho, Antonio Conte, Pochetino, Zidane, Klopp, Jardim, Emery, Sarri, Spalletti, Heynkes, Ancellotti etc; but it might surprise u to know that my 2nd best tactician currently is Allegri. (sbnation.com)
destroyed teams like real madrid 4 - 1 etc played top notch football, great tactician (justarsenal.com)
But they are not in the best shape to win next season — I personally does not rate Van Gaal, he may be a great tactician but he is not flexible and very poor man management (just ask any Barca or Bayern fan)-- He has his philosophy and all players have to follow it or out — Falcao and Di Maria — top top players but both flop badly — coincident? (justarsenal.com)