I too have wasted WAY too many hours trying to make AI execute a SEAD mission properly, using every method described in these forums. Thing is, OCCASIONALLY but rarely, they do it. In frustration, I have resorted to scripting the destruction of the AD units, sometimes with a random factor. After all the AI SEAD work is transparent to a human pilot. Poor work-around, but better than banging my head against the proverbial wall.