Dry is good, but this depends on what you’re going to do. If it’s particularly wet cutting will be harder but engraving will probably be fine.
Redwood in general cuts quite easily. I was using Sequoia Sempervirens burl and it was dry as a bone. It turned out very nicely, I think.
Suggesting settings is a waste of time-- your species and thickness and moisture content is just too unpredictable. I’d suggest getting a solid understanding of testing routines:
You’d have your answer in less time than it takes for me to write this reply.
You’re going to struggle to cut any species of wood at half inch. I would suggest sticking to the 1/8" thickness area if you can get it, but no more than 1/4" really. You’ll struggle to get an acceptable result, even with an easy cutter like redwood.