This song relies on two synths- the Prophet 12 and Omnisphere. I don't have much soft-synth experience, but have found that some really nice sounds can be gotten from the emulations and samples of some of the traditional synths that are included in this software synth. For example, the pad at beginning is a mix of a CS-80 bass and a sample of OB-6 patch called sublime w. some glide. Some Strymon effects and a Cakewalk drum sample (which I play manually) round it out at the end. The P12 - which is used throughout, and exclusive after 4:00, is still a competitive all-around synth. Yes, the birds are P12
https://soundcloud.com/wavescape-1/october-divine