So far the VIP Challenge is actually the "Don't accidentally use up your boosters" Challenge

punkysdilemma

My brain is apparently really resistant to learning to look left and deselect my boosters.  This is frustrating given you can't just go prep more of them.

I'm torn on whether to use gems and coins to upgrade old venues to do better on the VIP Challenge, or to bank them in advance of chapter 17.  Hmm.

doantuankhoi

Hi, in my opinion it is better to use gems on your old venues to get wind of present and future Game Of Thorns in those venues, since you will get more stuff from them with a lower cost than for VIP Challenge. VIP Challenge returns your gems very very slowly with a very high initial investment, so just take your pick. Good luck!
Also, you can see my video playing VIP Challenge for Chapter 18 here too, it's a tough one: https://www.youtube.com/watch?v=gyKm-jeGVZc