At 5'8" and 161 lb's what exactly is your goal here? What do you want to get out of training?
I'm not anti-split training but it has to be for a specific reason and you should already have a good base prior to switching to a split method.
"And for crying out loud. Don't go into the pain cave. I can't stress this enough. Your Totem Animal won't be in there to help you. You'll be on your own. The Pain Cave is for cowards.
Pain is your companion, don't go hide from it."