Good stuff, in terms of the composition this is really well thought out.

Careful at the start with that reversed stuff, sounds like there's some clicking, make sure you put a fade (even if it's extremely short) to avoid the noise.

At 3:18 the arpeggiated synth that comes in takes over a bit too much, I'd bring that down just to leave space for everything else. I'm also not a huge fan of where the snare is sitting, I feel like it should sound a bit more powerful. (Though that could just be a matter of personal taste)

Otherwise at both drops it might be nice having something in the mid range to harmonize with the bass? Not entirely necessary though.

Good work! Looking forward to the final product.

so far so good. I'll focus on the main drop here.

The lead sounds good, but atm it sounds pretty empty. If you listen to Porter Robinson's "Divinity", imo, it has that big, epic vibe to it because of the big saw chords that back the lead, and white noise and crashes to fill up the highs and give it more energy. Just make sure you EQ everything correctly so everything pops out the way it should.