Vanguard Total World is half US stock, but has the same expense ratio as a Total International fund. You already want a slightly custom allocation, so I'd just go with two ETFs:
36% Vanguard Total Stock market ETF (VTI), 0.04% expense
24% Vanguard Total International ETF (VXUS), 0.11% expense
40% bond fund of your choice
Note corporate bonds are lower quality than government bonds, so during a crisis they might not be as good a counter balance to stocks. When stocks panic the market, people buy US Treasuries - the safest bonds. They don't flock to short-term corporate bonds.