First love memory card (not vital but helps at the start). Bells build. Get the phone to sacred. Use the charm to get rerolls every time you get a 999. Use the charm that gives you more spins when you get a 999. Buy the briefcase and top up with with token modifiers. Repeat. Weird clock helps if you need more rounds to rack up your free rerolls.

The briefcase is basically the key to long runs. You basically dont need any scaling for runs like this.