Okay, broad plan.
Go to Robine posing as businessmen or merchants or whatever backstory we agree on for our party. We can't be out-and-out us or we won't get very far. I'm sure our socialites can concoct something.
Acquaint ourselves with some gamblers, and invest in a couple/few after observing their talents. Leave our goals vague, keep them in the dark, though maybe imply that we've got business with Merik so if they ask what our purpose is, they have something to chew on.
Help them gamble their way to the top by various methods. Use the Force where necessary and whatever other forms of cheating we can figure out with these games they have to play.
Get the 2 million credits we need and get up to Merik's level.
Have words with Merik, murder him to death, and get the hell out of the tower before they lock us in. We need to figure out how well they can lock it down, as well as where they control it from so that if it comes to a climactic fight as it is likely to, we can shut off the defenses and bounce out of there.