As this phase of is well under way I thought I’d give my thoughts on what you might want to stockpile for phase 2.
Please be aware this is just my guess, I could be wrong, but this is the currency/materials I’ll be concentrating on.
Trophies
Jock Cards
Coal
Fancy Sunglasses
Family Guy Addicts 
Already on phase 2 and I am on day three of not being able to simply do one thing before the games freezes and crashes.
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You’ve moved quite well considering crashing issues you’re having. I’d contact support if you’ve already tried saving your game and reinstalling it
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