I engineered those same techs up to 20% tohit against that speed. Which is lower than I expected, admittedly. But the next tier of techs got me to 25% tohit against 40,000 km/s. AMMs only get better from there. "5-6" can only said to be ion-pulse-thermal with no grade or tracking bonuses.
In what way is that relevant to the conversation?
The point is that soaking AMMs with ASMs is irrelevant to AMM performance versus ships. It doesn't matter how much damage AMMs do - they could do zero or a million, if you exclude talking about their damage because you can just use ASMs.
Countering anti-missiles with missiles sounds silly because it is silly. Soaking AMMs with ASMs is 'meta balance'. Which is not actual balance.
or to put it another way, if Rock cost half as much as paper or scissors, it's not balanced just because you can take Paper instead of Scissors.