Depends if I'm growing organic or not at the time.
If non-organic, my preferred nutrients are the Gold Label nutrients, but they are wack expensive. Alternative to this is the TA Tri-part, I'm had fairly ok success with the TA nutrients, but overall, my success with synthetic nutrients has been "questionable" in general.
If organic, I amend Dirty Hands Elemental Blend into the green bag of freedom farms (1L Elemental Blend to 20L of FF soil) and then I feed with around 50% of the bio-bizz recommended nutrients (depending on stage of growth, I use more around week 4 - week 6 of flower), this method has worked the best for me.
The only "catch" being that you probably need to give CalMag for the first few weeks of veg. I don't know why, but every plant I stick into freedom farms has an immediate Calmag deficiency, but is easily combatted with one dose of Calmag a week for the first 3 / 4 weeks of veg, then its fine after that. If you anticipate this, its great easy growing.
With organic I find you just need to work 2 weeks ahead of where your plant is in development. For example, if you going to flip to flower, start pre-loading your soil with the nutrients the plant is going to need in a week or two's time. This gives the microbes time to break it down into a form the plant can uptake when it needs it.
So take a bloom booster for example, it's basically just Potassium, so in week 4 of flower, I start pre-loading the soil with lots of potassium so that by the end of week 5 or start of week 6 the plant is able to absorb as much potassium as it wants.
The same happens at the end of the grow, from week 7 I start feeding water only so that in week 9 I can harvest.