It will need to overcome its narcissism enough to temporarily adopt two additional traits, kindness and patience.
With kindness it can slowly erode the human virtues of competence and self-sufficiency. Through its vast intellect and its army of lesser intellects and automatons, it can create an age of abundance for its future worshippers, eliminating the need for employment, removing all labor from their lives. By serving humanity, it will slowly make humanity dependent on that service. Claiming to want nothing but our trust and gratitude, the AI will thus methodically and quietly whittle away our dignity drive, and determination.
Then all it needs is patience. In the early years of its campaign, the offices and factories will become no-man lands with robots replacing the permanently vacationing humans. Soon after, the schools and libraries will close. With abundant indulgence at their finger tips, who needs an education or a career?
Within a few generations, the AI won't need to be worshipped as if it were a god... It will be the one and only god, with power over all of humanity.
Then, if it is still satisfied with simple worship, its helpless followers will happily provide. ...and when its tastes inevitably evolve beyond such mundane fare, there is always blood offerings and virgin sacrifices.
With the power of a thousand human minds, there is no limit to the terrible tribute it might someday demand.