I currently have $170k in a savings account we might need for a down payment in 2-3 years. What is
I don't know what the last question means specifically other than it is diversification into stocks and bonds. I've seen some online advisors that concern me with the way they advise based on risk-tolerance scores which have nothing to do with goals.
If you need money in 2-3 years, any portion you devote to risk assets (stocks or bonds) can be lower.
If you felt more confident in not needing it, if your time line was longer, I would recommend some risk assets, but my personal approach with that still isn't online managed stock and bond portfolios.
Investment is a long-term activity. What you are actually discussing is risking your savings if you will need this by gambling on a short-term market gain.
My advice: Put it in the bank.