No, in Core-only you don't need to make the enemy stronger (I guess), but many of enemy aren't core.
Games http://www.giantitp.com/forums/showt...OC)&p=21719630 (Retired) New World http://www.giantitp.com/forums/showt...211328&page=31 http://www.giantitp.com/forums/showt...211299&page=12