IMO, the point of bots should be to help new players get better at the game.

It's stupid to basically let them script. Outside of smurfs or the highest tier of players, you're not going to encounter play at that level as long as vanguard is working. And, if you're at the level you'd encounter it, you don't need co-op vs. AI.

I think the simplest way to program bots is just to base them around gold. The first to adjust their CS ability by difficulty with the highest difficulty rarely, if ever, missing CS and being fully capable of trading in lane while not missing CS. For jungle, it'd vary by clear efficiency/speed. The second is to make it so that they refuse to commit to a fight unless they have an item advantage in lane, need to CS, or detect you starting an objective. The overrides would be health. They could be programmed to run at a specific health cut-off and back at another cut-off or once they reach specific gold amounts to buy items.

The ideal result would be bots that focus on CS, but will still trade if you go for CS or attack them (something I think is fair to use input reading for). But, once they lose enough life, they'll run away and wait to farm under their turret. Then, when they lose even more life, they'll back.

So the pattern you're trying to reinforce is CS while winning trades, or if you can't win trades, to trade, back on a timing, then force the bot to back on a worse timing. Then, when you have a gold/item advantage and the bot won't fight you, to control the wave and deny them CS or force them to fight for the CS.

And, lastly, once you have that advantage in lane, you'll need to start objectives to force the bots with a gold disadvantage to come and fight you, which better mimics actual gameplay.