LUFS is a function of average volume and frequency distribution. You want to clean up your mids, lower the bass a bit and use group busses to clean up individual parts of your mixes.
LUFS is frequency weighted, meaning that its particularly sensitive to the mids and not as much to the lows, especially sub bass.
With LUFS, theres always a tradeoff between dynamics and loudness
Taking a listen. Definitely feel like your sub bass is way too loud, and your leads/melodic elements sound too thin. I also think that the structure is too basic and gets repetitive over time.
With trance, you want to introduce variarions over time, like every 8/16 bars or so there should be something new happening in terms of percussions/synths introduced/patterns evolving. Automation also helps in varying things up, its good to automate filters/volumes/dry-wet knobs on effects.
Look up and follow along some trance tutorials on youtube. A lot of basic arrangement/mixing/chord and note selection advice is applicable to audiotool.
Making good supersaws is a bit tricky, since audiotool doesn't do unison voices as easily as a synth like Serum, but I can share some workarounds with you.
As far as the mix goes, its a combination of good sound design, picking good chord layouts/chord structures. A good chord progression should sound interesting even if youre playing it on a single saw oscillator.
Use groups to really tighten up your mixes, I usually have a mix bus for my drums, bass elements, synths and FX.
If you want, I can make you a trance template or share a small project with you with some synth sounds added.