There needs to be PvE episodes for the Klingons in that sector. As the Feds are trying what they can to stop the onslaught, the Klingons should have their own plans in motion to defeat the Borg (and the Undine). Maybe even missions to ensure that they have the upperhand in the Alpha Quadrent once the dust settles.
Klingons have access to 4 missions. I don't remember the exact titles but I did them with my 2 Lt. Generals. 2 involve the Borg and 2 involve the Undine. I'm not sure what the minium rank is but I was a Major General when I did them.