you want to add a lot of layers in the drop and arrange them like a complextro or future bass song would. some instruments to start of with would be things like dubstep growls and basses, supersaw chords, etc.
Generally, glitch hop songs to be between 90 or 110 bpm and feature a bunch of bass sounds similar to either dubstep or complextro/EDM. More over, a great deal of glitch hop songs have shuffly drum patterns.
I suggest that you search on youtube "monstercat glitch hop" or "gaming glitch hop" if you want to know more about the genre, since I think these would be good examples of that genre.
you want to add a lot of layers in the drop and arrange them like a complextro or future bass song would. some instruments to start of with would be things like dubstep growls and basses, supersaw chords, etc.