If it were me, I would probably take it back to 6 months and invest the remainder, particularly because you have 7+ months in your taxable account as well.
That way you have the peace of mind of a six month cash fund, and you are investing a good chunk. Over time when the taxable account increases in size, you can even slowly reduce your emergency fund further by adding to your positions to say 3 months, and even on down to 1 month in advance.
To me, the emergency fund is more important at the beginning, and becomes less important as your taxable war chest increases in size.