I'm curious to know whats so unbeatable about Mohegan Sun. They offer 6 deck games, double any two, double after split, can split anything but aces as much as you want, aces can be split only once, late surrender, and it might take some scouting but you can find decent to good penetration if you are willing to really look for it. The only tables that have no mid shoe entry are the high rollers pits, all others you can wong in and out of to your hearts content. They also have some of the sloppiest and untrained dealers that I've ever seen, easy to take advantage of for some advanced techniques, and over payouts. My team has been feasting on this place this year to the tune of six figures. If you can't beat their games, or at least find a good one to play, than I don't believe you're trying too hard.
I'm glad you're having success at MS, but I have to agree with the other poster. All I saw at MS were dealers cutting off 2 1/2 to 3 decks, out of six. Unplayable. There was also mention of that in the blackjack forum monthly newsletter, saying MS is unplayable and Foxwoods was much better. Personally, I find consistantly better pen at Foxwoods. Got one (lazy) dealer the other night cutting off less than one deck in the 8 deck shoe. I find the comp points better at Foxwoods also. They're pretty tight at MS. To each his own. If you're beating them at MS, more power to you. Continued success to you.