Psytrance kicks are punchy with a short tail. Use Fruity Kick or layer samples:
Top tip: In FL Studio, bounce your kick to audio in the Playlist and use Fruity Parametric EQ 2 to notch out any mud (~150-200 Hz).
You have the sounds; now make them slam. Psytrance is notoriously dynamic, but the top tracks are slammed with clarity.
A top track has depth. Use Fruity Convolver with a "Hall" IR on a reverse cymbal or a vocal chop.
To save you weeks of searching, here are the top resources specifically for FL Studio users:
Every great Psytrance track rests on the foundation of the Kick/Bass relationship. In FL Studio, achieving this "pumping" groove requires sidechain compression and phase-accurate processing.
Route all your synth leads to a single mixer track called "The Psy Bus."