I'm thinking the "light dose" should work, but i really like the idea of halfing it, especialy only a week old.
Make sure the soil has a chance to dry out after each watering. Pretty young to be showing sighns of no nutes.
Soil bacteria and humates should be added when you mix you soil before you do anything, and throughout the grow.
If you haven't added the soil microbs, then do so, they help throughout the growth of the plant. If adding only during budding this may be a waste of time and microbes.
As far as the bloom recipy at the last of the post seems ok as long as your sugars arent much over 2tbls per gallon, I use a little less. Check the lable of your humates some are not to be used the last 3 weeks before harvest. Big ?bloom already has microbes so the mics could be overkill.

Love Peace and sticky Blueberry.