Take the passage 2x as slow. Play 4x.
If it's quarter=100, play it at eighth note=100.
At the slow tempo, tongue each note 2x. Play 4x.
Change the rhythm to dotted eighth-sixteenth. Play 4x.
Then flip that rhythm to sixteenth-dotted eighth. Play 4x.
Repeat these steps after moving the metronome up 4 clicks (if
you're not ready for this leap, just move it up 2 clicks).