The biggest rendering hog I've run into is lights. The more lights, the longer the render. I use the fewest lights possible to achieve the desired results. It's amazing, in fact, how few lights are needed in a render with some tweaking.

I also save my favorite lights, poses and other library settings.

Brynna

With your arms around the future, and your back up against the past
You're already falling
It's calling you on to face the music.

The Moody Blues

Dell Desktop XPS 8940 i9, three 14 tb External drives, 64 GB DDR4 RAM, NVidia RTX 3060 12 GB DDR5.
Monitor - My 75 Inch Roku TV. Works great! 
Daz Studio Premier 
Adobe Creative Cloud - newest version