Core International Equity: DFAX
Extended Duration Treasuries: EDV
These are other assets that I have reviewed. They may be good things to invest in and they may not, but my conclusion here is that they aren't really vital parts of a Risk Parity portfolio, or that there are better alternatives.
Dividend Funds: SCHD, SPHD, and VIG
Large-cap Growth: VUG (beaten out by IWY in a challenge)