The VST's I used for this song are Blue II https://www.pluginboutique.com/product/4-Synth/456-Blue-II and FM8 https://www.native-instruments.com/en/products/komplete/synths/fm8/ however you could replicate it with any free fm synths out there.

The synths in the intro are mostly just analog fm presets i loaded into Fm8 with tons of effects like overdrive, phaser and reverb. A lot of the time it's much easier and convenient to find a good preset and edit the hell out of it until you get something unique. I will make my own synths from scratch but this song was mostly using the first method. I really like to put at least a little bit of distortion on synths for a different feel, I really like how distortion and delay/reverb sound together, adds a lot of weird little bits to the sound. This song also had a lot of inspiration from some of FASTLAND's stuff, maybe you can get some ideas from them too: https://soundcloud.com/fastland

Hopefully that was helpful, feel free to shoot me a message about it if you want.

Glad you liked the song!