The use of any kind of "wall" against Borg is difficult because of
Adapt:Negate Obstruction. The most popular dilemmas are "first kill, then wall" like:
Rules of obedience
Eminian Disintegration Protocol
Misinterpreted History
Normally, these are hard to get past even on a second time when encountered because the kill is going to happen before being able to meet the requirements (so you need to bring more than the actual requirements to guarantee getting past - particularly for EDP, unless you bring six ❖ with none of them being the target of the kill).
With Borg, I would think you would be better off with Dilemmas that (a) filter (b) enter into play and stay there or (c) Kill everyone or many many personnel. What do you know, this is exactly what I recommended in the last thread about dilemmas I responded to!
viewtopic.php?f=24&t=50639
Dilemmas that you can't beat with Skill sharing because skills don't coem into it are great too.
Now, the Chandra does not work against Borg -- the drones all have same attributes. And if they are sharing skills
Romulan Mindprobes won't work either. But they are incredibly easy to filter with
Lineup or
Chula: The Drink, all of which will stop for random drones.
Borg also lack classifications and "irrelevant" skills like officer, honor, greed,
So for palnet for planet:
Horta (Yes, it has skill requirements, but mindmeld You need the queen?)
All available Hands
Deliberate Tactical Error
Volcanic Erruption
Lineup
Subspace Fracture
This kills a lot of drones, although they will still be able to finish the scouting attempt.
For Space:
The Weak Will Perish
Persistent Individuality
Maglock
Persistent Individuality
The Weak Will Perish
Replicator Accident
You can insert any Q dilemma (except the original, which has a stop at the end) to act as a filter because you will stop a certain number of personnel using
My ship, My Crew but likely not all of them while penalty boxing or mandarin bailifing one personnel as well (typically)