Fire’s general recommendation to not build kitchensink customs will suffice for now.
As it is, customs are meant for intermediate to advanced users who have mastered or have some sort of mastery over main store titles and main store title stacks. They can take this knowldege and carry it over to when they build their customs.
Density isn’t as important in Zero Point subliminals as it used to be in Q and Qv2 titles or stacks or customs or custom stacks. Rather it is focus that is important in Zero Point. Especially in customs.
The more focused a custom is, the less significant the number of modules whether Focus modules or Synergy modules. If all or most modules of a certain custom are focused on a particular goal in mind (for example building an aesthetic body or doing day game or building a new business from the ground up) then it is pretty easy to choose your Synergy modules for the job and the worry on whether the number of Synergy modules are too many, won’t arise.
All the modules are too busy working on your goals and they synergize well with the theme of your custom build.
There have been times when our friends Vesper and Invictus have introduced some variety in their customs. They look a bit unfocused but they can compensate for it with massive action and/or that the theme of their custom matches their every day plans and hence do not matter as much when it comes to focus. There is a method to their madness.
Of course, they are also able to experiment since they have mastered their wealth goals and hence don’t have to worry as much when they experiment with crazy subliminals.
In short, choose a goal and build your custom to achieve that one goal.
Or if you want to risk it a bit, make a custom for two goals.
It is said that one can only optimally focus on at most 2 goals at a time. Fitness and money. Or health and seduction. Or money and health. Or etc. (this is a personal opinion and not meant to be official recommendation)
Remember that customs are nonrefundable. And hence not a beginner’s toolkit. Some creativity and ingenuity are welcomed when building customs.
PS: not a post specifically for my friend @TheGreenMan since he loves tinkering and making idea plans for customs. This is a general answer on why guidelines for customs aren’t as important.