I can honestly say that overdrive is the shiznit. Definately get that. Some others that I use effectively is BCuzz Bloom, Top Booster, PK 13/14, hmmm, MOAB, Supernatural's Bud blast, which is basically the same as moab. Another thing I should ask, is this for the initial flower sets, or are you later in bloom. Cause you can hit them with mad phosporous in the first week to and you'll see bud sites faster. I usually see pistils start forming on day 7 when I hit with high phospo.
Also, be careful of advanced. With my experience and from whay my store guy tells me, sometimes their line can be spoiled. I know they sent him a letter apologizing for over 100 products they stocked him with that were bad. I successfully use connosr.a and b, vodoo, and overdrive. I combine a bunch of different lines though. Right now I'm on a house and garden kick. Amazing results off their Hydro line and Roots Excel. Bud XL is also amazing bloom stimulant used later in the cycle, but again, I hit them in week 1 with what gets fed for week 5. Do not overdo it though, just let your ppm climb about 200 when you add it, no more than that the first week or you'll invite some problems you could've easily avoided. Hope this helps