Here's what I know about Molasses - start using the UNSULPHURED molasses in a tea, about a Tsp+/gallon at first bringing it close to a Tbsp/gallon by the time you flush. Use IN COMPLIMENT with other organic nutrients (otherwise, why are you using molasses...get other chems). Begin feeding in LATE veg as a filler between feedings (i.e. Feed, Water, Molasses, Feed) This means you'll only use it every 10+ days or so. No more than that - otherwise the sugars build up in the soil as the microflora can't keep up and can attract pests.
The only benefits to this is to provide your ladies with an active and abundant soil, full of mirconutrients and simple carbo's. It essentially promotes healthy soil.
For me (and I have done this a couple of times now) - I just transplanted three of my girls into Empire Builder soil (which is ammmmmazing) which has about 2 weeks worth of nutrients in it - because I time my transplants, at the end of the two weeks, I will switch to flowering where I can start using my bloom nutes regularly. In the meantime, I will add molasses, in tea form, every other watering...so in the next two weeks, I will add molasses twice at a really low dosage as well as water twice (doing a thorough drench with the molasses and lighter watering in between).
This will "prime" the plant for flower, keeping the soil healthy, and encouraging the plants to use every last nute in that soil before I start adding nutrients - remembering that nutrients are salts and require an active microbiota in the soil to break them down and keep the plants from locking nutrients out due to salt build-up.
So - slowly increase dosage, use every 10+ days, start in late flower corresponding with your transplant to a larger pot (and fresh soil).
Other than that - it's about as useful as it gets. Most other info seems pretty bogus, and this is distilled version of all the shit I read - coincidentally, it is also the only information that everyone agrees on.
Good luck.