The idea that auras cause burn out when used too much rings true to me. I had similar happen with a competitor’s sub (great results at first, followed by burn out). I made a custom that included Primal Seduction (with whatever auras that includes) plus aura of craving, aura of approachability etc. and found a similar thing - great results early on, but at a future energetic cost.
Overuse of auras has caused symptoms of exhaustion for me, things such as decreased gym performance, increased susceptibility to illness, erectile dysfunction, increased need for sleep, increased caloric intake.
I guess it comes down to how much energy you have. If you’re in a calorie deficit, or depressed, or ejaculating frequently, or fighting off an infection - basically anything that uses up energy - the aura will suffer. What really sucks is from my experience (hopefully your results vary), I have this annoying catch 22 where if I use up loads of energy on a really sexual aura, by the time I have put myself in a position for sex, there isn’t enough energy left to get a strong erection and so from your aura she’s expecting an extremely virile sex beast and what she gets does not live up to expectations. It sucks because you would hope that putting loads of energy into a sexual aura would also result in a really high sex drive and strong erection, but in my experience, the two seem to be entirely separate energetic systems and if you give heavily to one, you remove energy from the other.
This is why I think your customization options are really great. Now having learned this, I feel it is better to exclude auras from the subs that are used every day and use the ultimas to create whatever aura you feel you will need when you need it. My new custom only has whatever auric stuff is in Primal and Daredevil, plus an aura of approachability, so hopefully it will be less taxing on the system and more sustainable on a day to day basis.
For Libertine v3, perhaps you could link into some scripting that would limit the energetic requirements of the aura so that it never used up more energy than you would need to then perform sexually. As what’s the point of seducing someone with your aura if you can’t perform when you get them in the bedroom.