Robert here is how I am looking at structuring my next trip to maximize the myVEGAS stuff.
6 nights total
2 at the Plaza. There I will take the 1 night free offer so I will just have to pay for 1. $25 in free slot play. I will also snag the food and drinks offers there.
2 nights on the strip. Here is where the redemptions get intresting. It can be more lucrative to pay for your room with the standard MGM rewards offer rather than the free nights offers so you have more premium rewards you can redeem (my current max is 4). Option one: I out of pocket two nights at the Dirty Castle and take the $50 in free slot play for a paid stay and the $25 free Konami slot play there and another two $25 free Konami slot play offers at other Vegas MGM properties. This would give me a total of $150 in free slot play from myVEGAS including the redemption at the Plaza above.
Option two: there is a special free slot play redemption for a paid two night stay at Mandalay Bay. It is for $100 in free slot play. Add three of the $25 Konami free slot plays. Plus the Plaza $25 I took above and I would end up with $200 in free slot play from myVegas.
Option 3 is to simply take the 2 free room nights, 3 $25 Konami free slot play offers and the $25 Plaza offer which would give me a total of $100 in free slot play.
Now I should score some non-myVegas free slot play because I will come back to Fremont and spend two nights at the Four Queens. On every trip I also redeem the El Cortez boarding pass offer.
This is typically how I do it to maximize what I get from myVegas.