Hello i am well into producing EDM drops and i may be able to give you some advice.

1. Open Sylenth 1, load a Vandalism sound bank.
2. Create some minor chords (6 bars).
3. Turn volume of this to 0.5 (half).
4. Open either another Sylenth 1 or nexus and load a pluck or nice lead.
5. Copy chords from first sound, paste in new sound and chop how you like.
6. Make all of the notes smaller by a tiny bit.
7. Dont change volume on this sound.
8. Add a 1/4 kick.
9. Sidechain your 2 sounds.

See what that sounds like.

Hope that helps!