That's the whole point: no one has laid out the rules for this Convention. Each Convention adopts its own rules on Day 1. Shortly before the Convention opens, the party's Rules Committee proposes rules, which may or not be the same as the ones adopted at the prior Convention, but the delegates, as one of the first orders of business, adopt (or amend) those rules. It's all up to a majority of the delegates on the floor.
...to put it another way, Trump likely won’t care if he wins the lawsuits, he’ll just be happy watching the GOPe types have to deal with Chapter 7 when it comes to their legal bills.
Not in a lawsuit challenging the rules adopted by a vote of the delegates at a political convention. That lawsuit will be thrown out of court the first time a judge reads it, and Trump will pay the defendants' costs. It would be as frivolous as me suing you for failing to wear green pants on St. Patrick's Day.
...they’re certainly welcome to TEST the system and see if you’re right. They can also invest in the Argentina Stock Market...where they’re more likely to make money.