Defeat Battle Maiden to gather Info Mission

I've currently been farming the new warrior map where statesman tags along. And the next mission is to defeat CM and gather info. My question is: Is that a farmable map? Also, if we comeplete a hero's epic stooryline, can we still do a hero's hero?

Wherever Battle Maiden is, she'll have her warriors too

And you can do the Hero's Hero arc via Ouroboros a soften as you liek - just like you can use Ouroboros to do the new Hero's Epic arc as often as you like.

It's a sandy cave map.