So based on the new enemy stats, you should finish SGC at around levels 38-40, give or take 2 levels. You also have MUCH more flexibility in leveling up, so you don't have to strictly increase Attack and Defense every level. The game may be easier if you're traveling in groups (it already is, I guess), but overall there will be less grinding and more action
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I'll test all the enemies again once I'm about ready to release the update and make any necessary changes. I would like to thank everyone for all the help!