I would say at the moment
Mid - Zed and ahri, both are viable ahri mostly with her utility BUT zed really is kinda stealing the show at the moment with his wr and kda . I would say choose between those 2 for mid .
Jungle - Heca . Do I need to say more ?
Top - Darius , his sustain is too much too handle when fed and played fine . Late game will be breeze if u played well enough .
Support - Lulu and Lux , at the moment Lux and lulu are in a tough battle of popularity in high elo picks even tho lulu has a higher utitlity scale then lux compared to her Lux kinda has the advantge duel to her high ap ratio on her ult with the cd attached to it .
Adc - Lucian and Sona + Lux , among the other adc lucian at the moment is having the time of his life rn with his wn rissing also there's the sona lux duo deleting everthing .
Hope this helps !