What is the proper way to Bulk Train accounts [No Ban]?

Hey guys...
So I have been offering my services as a PowerLeveler and I got hired by someone to train 9 accounts (Group Iron Man) by hand and then 31 Mining on each.

I got all 9 accounts to the Node on Tutorial Island and got 2 of the 9 accounts on East Varrock and trained them in Mining from 1-26.

I woke up today to find out all 9 accounts were perma banned and he blames me.

So how do I avoid a Ban?
I was thinking maybe I did something wrong.

I DID speed through the dialog on Tutorial Island and I also logged into each account on RuneLite without closing RuneLite in between accounts.
I also did the 2 accounts in Mining at the same time by Multi Screening which was requested by the buyer.

I just started in this business and I already have bad rep.

How can I avoid getting banned in the future?

 

Personally, I think that creating multiple accounts on the same day, same IP is an immediate red flag. But if you create all of the accounts, and then play on them a few weeks later it's significantly less suspect. However, Jagex has never and probably will never give their secret sauce on how they ban new accounts.

You can try using a VPS like shadowtech or something cheaper and try to create them that way.

 

Thanks for the input @LowKey

 

Maybe 5 accounts on the same gim could fly. On the same jagex account, but that would defeat resale value.Also members should be paid legit through one account.

Proxies are the best solution, vps with separate ips can work too as was mentioned.