According to the release notes, AMD Radeon Software Adrenalin Edition 18.8.2 is the one to have for Strange Brigade, where you should get a performance boost of around five percent on RX Vega 8GB and around three percent on RX 580 graphics cards. It also brings support for the F1 2018 game, but no specific performance improvements were listed.
In addition to these two games, the Radeon Software Adrenalin Edition 18.8.2 driver also fixes some issues, including instability or stutter bugs in some games when playing with FRTC and Instant Replay enabled, various fixes for Far Cry 5 including one with HDR10 or when changing video settings, problems with FreeSync failing to enable in Call of Duty: Black Ops 4, and bugs with Radeon Chill and Upgrade Advisor.
You can check out the full release notes and download the new Radeon Software Adrenalin Edition 18.8.2 over at AMD's support page.