Add Darius some useful utility and then we might see him at tournaments
Honestly I don't see a good reason to pick him in competitive games outside counter picking some champions like
.
He isn't good at contesting objectives because he has no sustain against monsters (Nashor-Dragon) and just lose his HP without getting anything. His splitpush is also mediocre (Yes I know about
Darius build in solo queue but I'm not mentioning his solo queue strategy).
Some people may ask me "then why only Darius? We have plenty champions that do not appear in tournaments". Well you see he is the only champion that had 0% pickrate since 2013 mid season to 2015 juggernaut update. Then he appeared only when he was overpowered. So that's why. He has some good potential is his game design and all Riots need to do is to shift his power from straight forward 1v1ing people to coordinated play.