You are of course correct in saying that the EC-130 has considerably more power, but it cannot fly all the time and be in the air every time Ukraine fighters have to fly. There are many reports of Ukraine fighters flying four or more missions a day and of course over any part of the country.
As for the A10. I am afraid that I am in the camp of those who believe that its place on the front line of an intense war such as Ukraine is over. Yes it can inflict serious damage, yes it can survive damage more than any combat aircraft flying, but yes, with the number of effectiveness of modern Stinger type missiles they will take hits.
Those hits will, assuming they get back to base, need significant repair and will be out of action for some time. The A10 would likely be a one or two shot weapon