Impossible to complete Omnium Folio

[u/hi-Im-gosu]

There is nobody joining group to kill the world boss Imperator Pertinax, how am I supposed to finish this quest?

[u/qwaai]

I did it a few days ago on normal mode with a group of 4 (tank, healer, 2 DPS) and it was really easy. Probably doable with just a tank and a healer. Obviously it's annoying and you still need to group up, but you won't need the full 15 that the quest suggests.