The 1.4.8 abilities can be viewed on Dalen's thingy here:
https://war-abilityviewer.dalen.io/. When checking the triggers/requirements on Dalen's site you have to pay close attention to the purple boxes at the end of the line that say "AND" or "OR" as that's the logic that determines whether the multiple checks must all succeed ("AND") or if only one needs to succeed ("OR").
I still get tripped up on the ability view stuff, but this is what I think was happening in 1.4.8 based on the ability database for that patch:
1.4.8 Feinted Positioning
https://war-abilityviewer.dalen.io/ability/9397, pick 1.4.8 data
This ability creates a dummy buff in ability group 598 and 783 for 10 seconds. This buff is checked for by other abilities which are designed to act differently depending on whether the buff is active.
That's all Feinted Positioning does.
1.4.8 Throwing Dagger
https://war-abilityviewer.dalen.io/ability/9394, pick 1.4.8 data
This ability does not check for the Feinted Positioning buff when determining whether to apply the snare. It only checks for one thing:
- You must be behind the enemy ("TargetBack (0, 0) = 2")
It seems the TargetBack function returns 2 if you are behind the opponent, and something other than 2 if you are not.
That check is only applied to the snare debuff. The damage part of the ability always triggers.
1.4.8 Heart Seeker
https://war-abilityviewer.dalen.io/ability/9427, pick 1.4.8 data
This ability has two checks to see if the ability can be used, however only one of the checks needs to be successful. Those two checks are:
- You must be behind the enemy ("TargetBack (0, 0) = 2"), OR
- The Feinted Positioning buff must be active ("BuffGroupCount (598) >= 1")
If either one of those are true then you can use the ability.
1.4.8 Sacrificial Stab
https://war-abilityviewer.dalen.io/ability/9428, pick 1.4.8 data
Exactly the same as Heart Seeker:
- You must be behind the enemy ("TargetBack (0, 0) = 2"), OR
- The Feinted Positioning buff must be active ("BuffGroupCount (598) >= 1")
If you are behind the opponent or if Feinted Positioning is active then the ability becomes usable.
1.4.8 Agonizing Wound
https://war-abilityviewer.dalen.io/ability/9408, pick 1.4.8 data
This ability has two seemingly identical damage events that get triggered, however the checks for each event are different. The first damage event does not ignore armour but the second one does.
For the first one to trigger, both of these conditions must be satisfied:
- You must not be behind the enemy ("TargetBack (0, 0) != 2"), AND
- The Feinted Positioning buff must not be active ("BuffGroupCount (598) = 0")
Remember that for these checks, both must be true. If you are not behind the enemy AND Feinted Positioning is not active then this damage event is triggered and this is the one with no bonus armour pen. As an FYI, "!= 2" is shorthand for "does not equal 2".
The second damage event also does two checks, however unlike the first one it will succeed if only one of the checks is successful. The two checks are:
- You must be behind the enemy ("TargetBack (0, 0) = 2"), OR
- The Feinted Positioning buff must be active ("BuffGroupCount (598) >= 1")
If either one of these are true then the second damage event gets triggered and that's the one that ignores armour. You can see by comparing the checks between the two events that it's impossible for both to trigger as it's impossible for the conditions on both damage events to be met at the same time.
1.4.8 Throat Slitter
https://war-abilityviewer.dalen.io/ability/9409, pick 1.4.8 data
The damage component performs two checks and is applied provided one of the checks is successful:
- You must be behind the enemy ("TargetBack (0, 0) = 2"), OR
- The Feinted Positioning buff must be active ("BuffGroupCount (598) >= 1")
These checks do not apply to the silencing effect that it also applies.
1.4.8 Summary
From what I can see, in 1.4.8 the only WE ability with a positional component that was not affected by Feinted Positioning was Throwing Dagger. Besides, any WE ability which checked to see if you were behind your target would also trigger if you were not behind but Feinted Positioning was active.
Finally, Swift Movements let you do all of this every 20 seconds instead of every 60 seconds.
Hope it helps, apologies if this was already covered in full in the thread. Now going back to my slumber...
P.S. The ability viewer also has the 1.3.5 abilities. I have not checked those.