Well, I'd bet $25 for entertainment and $100 if I was serious. But before the projections came out I really thought 85.5 was low and might have gone bigger. Gambling trends are partly based on sentiment (from amateurs and fans) as much as sharps and analytics and I think that number is reactive to last year's flop. But obviously the computers think otherwise. You also have to be an optimist to think everyone will bounce back/stay healthy, and that's no way to make money either. The best way to win on the current line is if they add talent that it currently can't account for, whether that's bigger contributions from call-ups or trade additions. If they went out and traded for Kris Bryant next week (remember, at this time last year they didn't even have Harper) the line would presumably shoot up to 87.5 or 88, if not higher.
I wouldn't touch the World Series bet except for $10 of entertainment. Maybe the NL East.
Betting against the Mets seems like a good idea. Plus, fun!