Best ingredients to make super soil ?

So I have a few 50l bags of cre which is a soil Medium which has kelp in.

The plan though I want to use super soil for my next grow and leave the liquids out.

Instead of starting from scratch I'm thinking I will just add organic material to the potting mix I have . For an all round supersoil to cover plant from start to finish what are must have ingredients to add to the soil ?

When it comes to easily available goods, Neem meal is a good all round fertiliser, has pest control benefits and ferments well (6-1-3 ish), alfalfa, barley and soybean meals are good for N and act as good composting activators, Coconut meal and Kelp meal is good for K, and rock phosphate is good for P. Ground chitin is also great for calcium, phosphate and enzyme production. Can't go wrong with a bit of horticultural charcoal and pumice for aggregation as perlite breaks down too much for my liking. EWC is also worth the money if its freshly sourced. More Neem, Alfalfa and soybean for veg. More kelp, coconut and phosphate for flower. Malted Barley has amazing fermentation/fungi and bacteria production and is handy to keep shit alive.

Something like a base medium mixed 1:1:1 with compost and aggregate is a good start, and then add some fresh meal organics to the mix and let cook for two weeks in a well aerated bin or tarp.

Don't discount compost teas or activated organic compost if it comes too it either. Lime is handy too as a buffer, but don't go overboard as the microbial sphere does a good enough job at buffering in a living environment.

What you want to add at each recycl-ing is a compost input, mineral inputs, and fertilizer.
The most important amendment is compost.. namely worm castings. Compost is what drives the soil and usually has become inactive when a soil mix begins to fade. It is not easy to keep a container of mix highly active over the long term which is why aacts are used to help maintain a soil’s microbial activity which in turn will feed your plants through decomposition. Adding heavy compost usually weighs a mix down so use perlite and or coco coir to lighten it up. Adding granular mycorrhizae in the hole at each transplant helps with absorption and solves a ton of issues before they even occur.
Organic matter typically pulls ph down; mineral inputs provide macros and help buffer ph. Azomite, garden gypsum, and/or dolomite lime are all good choices. I like adding soft rock phosphate at the first recycle which takes years to break down so you only need to add it every so often. Oyster shell flour is a great ph buffer in the root zone; takes a long time to break down too so lasts awhile. Whatever you add to the soil be sure to let it sit for 30 days to normalize ph. Then it’s ready for use.
For fertilizer inputs I second the neem meal; it’s good veganic npk and actually will keep pests like thrips at bay. I also suggest a slow release fertilizer like chicken or cow manure in the mix globally or brewed in a tea. Charlie’s compost brand is very good shit. Kelp and fish bone meal I consider to be essential. For an easy fertilizer for bloom phase consider pushing in a couple Jobes AP organic spikes; they feed for 8 weeks.
Your mix will improve each time you recycle it. It gets better with age. Try to add lots of things in small quantities and do t be afraid to mix it up & add different amendments each time; diversity is just as important as npk value. Try not to add anything to a living soil mix with an npk value higher than 6.

Living Soil Mix Kit

Living Soil Recipe How to Make Living Soil with a List of …

...
May 02, 2017 · Living Soil Recipe: 1 Part Organic Canadian Sphagnum Peatmoss. 1 Part Premium Organic Compost. 1 Part Premium Organic Aeration and Drainage (We use Rice hulls and Pumice) Fertilizer Amendments Per Cubic Foot:

I've mixed plenty of soil but am no expert. I used to buy the stuff in the crappy brown boxes (natural some shit).....lots of boxes. Each $9.99-$19.99.

Now I use espoma tomato-tone. It has all the brown box stuff mixed together in from my understanding a fairly good ratio for marijuana growing. CHEAP!

I use blood meal when I re-amend, never had leaf burn and seems to have solved the N deficiency I seemed to encounter more than I hoped for.