Hello,
lately I’ve been struggling with overall tiredness and lack of happiness, perhaps linked with dopamine.
I’m looking for title/stack for
Preferably something light with fast effect.
Basically you could tackle everything just with Genesis: The Art of Happiness and Joy
If you would like a vaster approach Sanguine OG.
Both titles are pretty light and fast acting.
I think someone called this the ultimate feel good combo (paraphrasing)
at the level of specificity that you identified, i feel like almost all the subs in the store (within reason) would help you.
What sub are you currently running and what impact has it had? Have you given any title at least 3 months?
To address the issue at the surface level, consider Sanguine for immediate relief. It’s the “fast acting” title that addresses this, and focuses on STATE change.
To focus on happiness SKILLS, try the art of happiness and joy.
But to build a life that makes you happy, gives you reason to get up in the AM, I’d run Genesis (not mogul, not the art of happiness and joy, just “Genesis”…). It’s about finding purpose and passion in life, and covers a bit of everything, and it’s pretty light/fast acting but you’ll be doing some heavy introspecting on why your life caused you to feel like this in the first place.
The lightest with fast effect around feeling content, grateful, at ease, joyful and hopeful is Sanguine The Elixir in my opinion.
In my experience much better than Sanguine which I found to create an uncomfortable sense of peace and slowness/emptiness, it’s very subjective obviously but between Sanguine and Sanguine Elixir, if I had to choose a quick good feels pick me up it’s Elixir hands down, creates more joyful and grateful feelings and sense of everything is all right than the other.
You mean you would like to be productive? Maybe check out “Chosen” product line for this goal then.
If you just looking for overall happy mood Art of Happiness, Sanguine and Love Bomb (although might experience some recon at first with Love Bomb) might be your cup of tea.
Don’t forget Genesis 
I have a great experience with this one.
This also makes sense
Maybe read the copies of both and see what resonates with you more