1. Runner goes to soulstone chamber checkpoint, the person being ran hits "decline" for the boss, and the runner kills zk.
2. Clicks soul. Soon as it says "talk to adria" the person being ran leaves and clicks resume. DO NOT talk to adria in the original game.
3. In the new game they talk to adria, collect the first reward, then rejoin the game with the other person. The runner then leaves the original game and creates a new one.
4. The person being ran clicks on adria when the runner leaves, collect the second reward, and joins game with the runner.
5. Both stay in the game, click on adria, and collect the third reward.
You just keep doing 1-5. It takes like ~120 runs this way from 25-60. They go extremely fast though. Oh and for hell, you can have the runner do everything up until collect the soul before sending an invite to the other guy. Soon as the other guy comes in, runner clicks soul and they can proceed like normal. This just lets the runner have a quicker fight with "solo" zk.