Also stand by my initial statement as wyld ammy being best in game on certain rogues for one factor HIGHLY overlooked as well as a cpl smaller ones.
The direct damage on a valour ammy easily out powers the sun ammy skill unless you're talking about 5* dl/short term fights. Otherwise if you had to put it into example it would be:
2 rogues using valour ammys auto, then for 45 seconds one person's ammy loses 240 heat damage while the other continues .
Also your perspective on people using the scoundrel ammy I can only agree to use it on one skill and that's rend, the ammy you suggested is cunning, str, vit.
For ss and poison it's an osan ammy, adds both dex and cunning.
And before you say you could use it on qs ask yourself how effectively you could swap a brace, ring (recommendations of toothpicks guide)
+ now an ammy.
If you were to not stubbornly answer this then you know the answer, uneffective and eventually you would screw up hence lose dps.