Even if I got a different system I guess it’s easy to say you can feel free to skip DLSS on a 3060.
I for myself see no difference in performance on 3440x1440 resolution screen while using an RTX 2080ti. On 1080p DLSS will render in like 720p and upscale it which likely causes ugly artifacts and won’t do much compared to TAA.
On DX12 you may get less stutters on panning by now and a slight performance boost (talking about SU10), however (like most of us) the issue still will be your main thread.
To increase performance lower especially the terrain lod setting, I guess on your system go with 200 to 250 for the visually best results and stable performance + DX12 for good performance on panning views around.