Damn I must suck or something....

Let me ask you this. What yield would you expect to get with this setup?

One hydrohut DLX w/ Mylar on the walls and floor (8X4X7).
4X 600W Hortilux 600 Super HPS Bulbs
16 - 5 gallon buckets with 8" net pots
Recirculating DWC with drip assist using Botanicare Readygro Areation

Botanicare Pure Blend Pro Grow and bloom
Liquid Karma
Fox Farm - Open Sesame/Beastie Bloomz/ Cha Ching
Silica Blast
Cal Mag plus (when needed)
Hygrozyme

Growing a strain like Critical Mass or Trainwreck being vegged for 4 weeks (from a well rooted clone approx 3-4 weeks old).

I do a pretty comprehensive LST and FIM topp in flower (with amazing results).

What kind of yield should I get and what else can I possibly do to get more??!!!!

I grew some purple grandaddy's with a setup just like this but at the time I only had 3X 600 HPS bulbs and did not top them or do LST. From 15 plants I only got 10 oz... :-(

It was awesome quality tho but the yield was shit.

I heard that GDP is a crappy yielder though and I am hoping for more from my next 2 grows that are currently flowering (being the afformentioned Critical Mass and Trainwreck).

Please help me. Show me the way!!!!

I have a great setup with good temps and the overall balance of things is really good. I just want a 3-4 pound grow to set me free!!