The A10 is the mother of all CAS craft. It's got more redundancy than a tank and very few, if any tanks can withstand a few of the 30mm rounds.
It's slow, low, HEAVILY armed and armored.
Only way to make it even better?
Add a minigun pod under each wing, one rocket pod under each wing and mavericks on the rest. With the 2 miniguns, it can take out personell, unarmored targets and such. I think it would be the one man equevalent of a Spectre...