I'm happy to help, but you gotta understand much of the information you are asking for is valuable to me as an active "small" gold farmer.
But I can tell you this, I have seend a remarkable difference in bans using private scripts.
My personal tip I can give you is to stay lowkey in game, for en example:
In lumby straight out of tut island there is a cow area north of the castle, but behind the cow area is an even bigger one but far less people.
And the main leveling is done in NMZ, people can't report you unless your bot gets stuck outside NMZ. Any AFK method is far superior to any active click intensive actions.
I've gotten banned for magic training on almost all accounts I've created because I am too lazy to AFK bot splashing, but that is the way to go.
And getting a successful farm up and running with these requirements will be costly (bonds, bans, gear and runes etc) so you have to be prepared for it.
And to answer the script questions, I still use my private bots for account buildings.
Make them come true, start grinding
I would probably say around 900k-1200k as for now. I am nowhere near 99 magic on the accounts, yet.