no suggestions unfortunately. the gear you have is excellent, and should be completely overkill for destiny @ 1080p. Im currently investigating overriding some of the games "checks" so i can force Vulkan or DX12 based rendering in hopes that a closer to metal api draw call might fix some of the games shenanigan's. but no luck yet. Sad part is the game does support Vulkan at least, as that's what the stadia version uses but Bungie refuses to allow us to activate it. the stadia version likely is coded for unix based OS, but the work has still been done regardless.