JTA is so fun, they do an amazing job of getting so many kids to do the same thing and keeping it interesting the whole time. I know your boys are going to love it!
LL touring is triicky, my advice is to check out the LL site and research tge rides as much as possible so that you have a good idea of what you want to do. I also watched all the
youtube videos I could on LL. Once you have a good idea of what you want to do get to the rides that will have big lines first. The Technix roller coaster, Knights tournament, The Adventure ride, those are all the the right and toward the back of the park. Also if your kids are interested sign up for the mindsstorms activity first thing. It takes 45 min and my kids did not want to take the time out of their day to do it.
I really wanted to try the apple fries they have in the park but we were to stuffed from the Upper Deck meal, next time I would share a meal with DH instead of each getting our own.
As far as the tix go I am sure that you will be fine with the brickmaster tix. Everyone should be able to use them. Also they are good for an adult tix so you might want to use it that way and only have to buy a childs ticket. There are some other deals like so much off a reg. ticket that you could use for the last ticket. I might have some left over deals, I'll check.
Thanks for reading!