My friend mentioned in jest that he could use the Pathfinders stratagem to force my Orks to only hit them on 6's, which they most likely would anyway. I mentioned I could use More Dakka to make an orks unit succeed on 5's and 6's, to which we both realised the outcome isn't very clear. So the question is, if both stratagems are active, can the Orks hit the rangers on a 5? What about Dark Reapers, who have an ability to hit on a 3+?
I argued that the Orks would be able to hit on a 5 if we used a stack like interpretation of the rules. That is the Pathfinders stratagem would occur and modify the existing rules of the game, then Dakka Dakka Dakka would occur and modify the existing rules again, overriding previous ones. If we continued with this argument then the Pathfinder stratagem would override the Dark Reaper ability and only allow them to hit on 6's. To clarify, the idea is that the most recent effect/ability takes priority.
My friend agreed that Orks would hit on a 5 but for a different reason, his argument was based on the fact that Dakka! Dakka! Dakka! states the hit roll "succeeds". For how this interacts between Rangers and Dark Reapers he wasn't certain.
Furthermore, we investigated the Craftworlds
FAQ which discusses the Culexus Assassin interacting with Dark Reapers. This scenario doesn't apply here as the Culexus modifies the users Ballistic Skill but everything I've mentioned is independent of Ballistic Skill.
I'm mostly interested in the result out of curiosity, as regardless of the outcome I doubt my friend will ever bother using the Pathfinders Stratagem against Orks.
I've included the relevant rules below for reference.
PATHFINDERS
Use this Stratagem at the start of an enemy Shooting
phase. Pick an ALAITOC RANGER unit from your army
that is in cover. Attacks that target that unit in this phase
will only hit on rolls of a 6, irrespective of any modifiers.
DAKKA! DAKKA! DAKKA!
Each time you roll an unmodified hit roll of
6 for an attack with a ranged weapon made
by a model in this unit, that hit roll succeeds
regardless of any modifiers. In addition,
immediately make an additional hit roll against
the same target using the same weapon. These
additional hit rolls cannot themselves generate
any further hit rolls. When firing a weapon
with randomly determined characteristics
(e.g. a bubblechukka), any additional hit rolls
use the same characteristics as the hit roll that
generated the additional hit roll. This ability
does not affect weapons that automatically hit
their target.
MORE DAKKA!
Use this Stratagem before an ORK unit from your army
shoots in your Shooting phase. Until the end of the phase,
that unit’s Dakka! Dakka! Dakka! ability triggers on
unmodified hit rolls of 5 or 6, instead of 6.
Dark Reapers Inescapable Accuracy: Models in this unit always hit on
a 3+ when firing a ranged weapon in the Shooting phase,
regardless of any modifiers.