I came here to check you out I admit, but I didn't just start ranting about crappy plants with no point, so yea I'm willing to help..
The first thing to address is the over-watering.. I'm pretty positive on that one.. The best cycle to go with would be to water when the soil is almost as light as when you put it into the pot.. Pushing the envelope isn't that risky on this in veg, your plants can wilt a tad, and perk right back up in hours if you push it a little too far.. If you're watering more than once every 3 days you should really question the necessity.. Especially with those plants since healthy plants will drink alot faster.. If they show signs of hunger then feed them.. When a plant is healthy its easy to tell from the growing shoots that they need N.. You can get away with recipes if you fork out the $$ for specialized nutes, but with basic stuff you really gotta read these plants..
pH test, and ppm test the watering run-off and compare it to the values before you dumped it in.. This will tell you ALOT obviously..
Now I'm assuming your MG soil is that time release fert stuff? That could do you in even if you do everything right, but when its over-watered, or even gets wet at Lowes it can create a wonky toxic mix.. Soil run-off ppm tests will tell you this though..
Given the curly leaves etc, I'd be willing to bet that the aspects that seem to be N deficiency are pH uptake related.. Again, just because water is pH adjusted when you pour it, doesn't mean it stays that way.. Especially if you use lemon juice etc since the substitutes for phosphoric acid have absolutely no buffering capacity between 6.5-7.0.. Contrary to popular belief, its not the fact that plants need P anyways that makes phosphoric acid ideal, its the fact that when H3PO4 gets neutralized, it tends to form compounds that allow the mix to resist pH change very well..
As for the blood meal, I doubt you accomplished much good, or bad with that.. Its best used when mixed right into the soil so it can be made bio-available by the microbial forces..
I wouldn't go adding N until you get some run-off readings, and I'd take some clones incase things don't improve.. My best guess is that the MG soil is to blame more than you are (assuming its time-release)..
Schedules can only really be determined after you get to know the particular plants.. Thats one of the reasons alot of ppl love clones (very few surprises).. However much food they need can be applied however you choose.. Some ppl give them weak nutes at every watering, others cycle it and apply stronger feedings.. As long as nutes are available, and non toxic its all good as long as you allow the roots (and microbes) to get at oxygen between waterings..
Next time go with a nice organically rich soil.. You can mix that up yourself with the cheap ingedients from various recipes.. Some lime, some peat, blood/bone meal, and general compost.. Organic is the 'real' time-release fertilizer.. If you start with good soil like that, then you won't need too much additional fertilizer (and probably won't need any for quite a while), good micro-nutes will be available, soil microbes will be happy, and pH will stay reasonable inside the pot..