Proone
If we get past your comment on what you think you would like to arrive (indicating you haven't been in that position yet) and that it differs massively than those who call for CAS on a daily basis and who are the customer here, what aircraft do you think has a chance of surviving in a non permissive air environment?
Even 20 years ago stealth aircraft were brought down with relatively cheap systems and anything at low level is fair game for dumb bullets.
As a starter, Apache is out of the frame as it's slower than the A10. RAF harriers are out as they were sold. tornado isn't much use as its 27mm gun is no match for the A10s Gatling gun against things like compound walls. F15 doesn't have the accuracy of the A10 for close strafing.
The A10 can operate both day and night, much like many other aircraft, but can't see through cloud just like the other assets available. Radar is no help in deciding if a chap is about to fire an AK or is a friendly local carrying a shovel.