Animation Stills

I have an interior animation to do. It’ll be a simple path without anything other than the camera moving. It’s going to be an HD (1920X1080) animation, so what time per still should I be shooting for? Right now I am getting 30 minutes per still on my Titan RTX. Is this too high or a pretty normal time? Do we still do pre-calc for the light cache or is that old school?

check the tooltips!
LC subds minimum 3000
retrace 8 minimum
leave it per frame for lc
bf
up to you, but 30 sounds fine (I know people that dont like it being more than 5, and also others that dont mind 10 hours)