Those supersaw sounds can vary from being very easy to very complex with many layers.
Sometimes you don't need to use several layers, if you use several oscillators at different octaves and many notes on different octaves, you may get away with just 1 fat and full synthlayer.
Also many supersaw sounds involve many other detuning
effects than just simple unison detuning, such as detuning oscillators to eachother (and then into a unison for even more detuning), or making a copy of an oscillator with a fast pitch-LFO or phase-LFO, or setting a very detuned chorus-effect (very fast mod-speed, adjust depth, full spread, be gentle with the amount), or setting a very fast pitch-LFO on the overall synth with minimum LFO-amount.... and the list goes on.
Ignore is onto something that is very common (I've used it myself), copy the patch, maybe some slight adjustment like increasing the number of unisonvoices and detune it a little further, maybe add some chorus, maybe kill the treble a little, all this to make it softer and act more like a supportive fundation and let the first one be the aggressive one.
Then to make the patch as fat and aggressive as possible you need to set the correct velocities on the different notes.
Listen carefully in your synthsound what notes are the most aggressive and full ones, and try boosting those, and try cutting others that feel unnecessary or even maybe destroy the sound a little at default velocity, maybe the can make the sound at a much lower velocity.
I you want the synth to sound aggressive and huge, don't forget to make it poppy. Adjust the vol envelope so you have a little poppy attack in the sound, maybe even a very very fast pitch drop for further pop.
Then the right amount and processing of white noise, EQ-boosts/cuts (supersaws like to be a little heavier in the 3-5 kHz-region), the right reverb etc can enhance the sound a lot.