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:HEF:
Are Battlefield monsters scaled to be difficult enough for your level?

IIRC due to an interview - they won't be as difficult as the enemies in the major plot but they will be higher according to the act you're in - and if I understood the mini quests in there => there will probably be boss monsters, too. The BF were meant for leveling up and surviving the enemies in these acts - so, they should be a tad easier.
Kiya