I had a thought on how to address this that attacks the problem from a different angle.
Since you're so involved in tackling this issue, I thought I'd bring it up for discussion, maybe we could refine the idea some.
"TraderCoins"
Coins that are mined by making successful trades for someone else with their capital.
So whoever comes up with the most successful strategy to beat down bots benefits from it, perhaps greatly. Even if they don't have the funds to actually make the investments necessary themselves.
The way I picture it, there would be a profit sharing component involved as well, so if you made a successful trade for me and it made me a profit of 10 BTC, you would get 1 BTC and some TraderCoins.
Perhaps the TraderCoins are the only currency used to contract new traders, so prospective investors buy the coins on the open market, and then spend them to retain a trader for themselves.
Your idea sounds complicated for me. I think that if a coin is excessively botted, that mean +50% of the trades are from bots, then investors should stop trading them.
This will have the consequence to hurt the one who is running the bot and he will have to redefine his strategy in a way that traders are enough space for trading.
Simply say, better avoid the junk coins than trying to defeat the bot in a war that is not going to help the regular traders who are just using the exchange interface.
I will rate the coin based on their health.
<25% of botting = healthy -> green color (go trading)
25-50% of botting = sick -> orange color (trade at your own risk)
+50% of botting = junk => red color (stay away)
This way, traders will have a way to focus their trade on coins that are carefully managed by the owners. The scams and dumpers will stay alone dying with their coins until their master understand the lesson and respect the investors by offering a healthy coin in a fair market.
What is the point to fight a junk coin where you are likely going to lose money in favor of the bot?
I will not create another bot that will fight the bot for the benefit of my bot users. I want to give tools for all traders so that they can take fair decision as to where they invest their money.
If it happens that all the altcoins are red, then stay with ETH/ BTC and wait that the altcoins stop milking the investors.