Don't get wrapped up in all the different and "magical" additives.
Keep the big 5 in line and keep up on your regular WC's and you'll be just fine.
I've witnessed too many hobbyists collect a huge amount of additives that they didn't need. Complete waste of money in most cases.
Sometimes the K.I.S.S. Method is best.
Need hobbyists are always drawn to these magic or "must have" additives and it only confuses things and complicates it.
Sony Xperia Z3