Speaking only personally.
Gen-X here and I started before the internet , and gave most approaches a solid college try before finding what worked consistently for me. Only the Grimorium Verum was with me from a young age.
Neville's New Thought and Chaos Magic works great. This is my take from observation - the world just casually shifts to your assumed reality. Most modern magic systems are New Thought / Chaos-Magic-with-extra-steps and a set routine to help you believe in yourself.
And you are so very powerful.
The daimons (used here in a very Neoplatonic sense) of the Grimorium Verum , and Grand Grimoire (the pact-based grims, but others probably too) are also powerful, but are very focused on specific results... like, right there and that spot. They are highly specific and a bit freaky, but also wonderfully weird.
Giving them specific things to do works best, but flexibility for how they get to that specific point works best. They act like intelligent spells and can route around blocks and protections.
Angels and saints tend to work like New Thought / CM in that very gentle way as reality just sort of casually slides into what you imagined. I
recently finished a working with the Shem for my sweetie to help her at work, and it's like the new reality was always that reality. It was not fast, but it was solid. They helped her grow into the person she needed to be to hold the new reality.
The daimons of the grims "are" Underworld , very claws-in-the-guts-of-reality forces and will yank stuff hard - and are very willing to violate other people's free will to do it. This is a feature, not a bug, and will let you fight fire with fire.
Honestly, just solid Hoodoo / Brujeria / witchcraft works great too. Why? I have no idea. I think it's somewhere in the middle. Sometimes I think the patterns used there just have a lot of "quantum precedent" - in a Bernardo Kastrupian sense - and sometime I think of it in animist terms and the spirits /angel of the plants are additional minds helping. And some times both.