Thanks for your long comment here!
This suggestion not just nerf healer Skye (what I suggested to replace anyways) and Preparation Skye, but also nerfs Debilitate similarly. She does not have to duel with anybody, her job is seeking behind the enemies and kill one of them. She can attack the lowest health bar owner enemy too, so she doesn't need much damage for kill. I didnt nerf Pioson bolts bec of Debilitate, but because its OP with the 3s cd as it is. Debilitate isn't a problem already. Poison Bolts are OP also without this talent, because its cd can be reduced from 8s to 3s. Deal melting dmg in every 3s isnt for a flanker. Flanker has no time to position itself in 3s. So she doesn't flanking just wait and use this skill again. This is what I would change. Her talent wouldn't be worse just bec of the lower dmg output, because she would have much more mobility what can not be countered by Illuminate and can help her to stalk, chase and flee. 25 ammo has basicly much more dmg what is needed for a kill even with the dmg of the Poison Bolts and the endless ammo by the Decrepify. It's way too much. If the battle turns to 2v1 she can escape with the skill Hidden what have speed bonus. Dealing against overpower isn't the job of the flankers, damage dealers are designed for deal superior damage. Decrepify's new bonus fits to its avatar and to the mechanic of the poisons. Keep it realistic.
Debilitate is a little bit better than her other talents. It got the hardest nerf in my suggestion by the Poison Bolt cd increasing. But the mobility buff would make her better in general, this is why all of her talents would be balanced.
15 shots even without any headshot deals 110*15=1650dmg. She can use Poison Bolts too before she attacks. It deals 2200*0.3=660dmg to a supporter. It is 1650+660=2310dmg (without headshots) what is enaugh to kill a suppoerter with one magazine without reload. Flankers shouldn't be even able to kill a full HP enemy, they are designed for find the weak link, who has low HP and end the job. So this damage is still more than enaugh for her. Anyways Twilight Armor could still reset her magazine to 25 ammo on lvl5. If you realy need it

The lower base magazine could make sense for pick Twilight Armor and Tactical Reload what are useless right now.