Like Ken said, defined goals drive the stocking ratios. To an extent, they also drive the type of BG stocked. Location in the country is more of a determining factor in what types of BG are stocked, and the timing of the LMB stocking.

Up North, there's the possibility of the BG stunting or out producing the LMB if the BG are stocked too far in advance of the LMB.

There are 3 basic Bluegill types that are stocked in ponds.
1) Northern Bluegills (BG)
2) Coppernose Bluegills (CNBG)
3) Hybrid Bluegills (HBG)

If you are in Texas, you can stock any or all of the 3 types.

The more food that a LMB has to eat, the faster it will grow. The less that it has to chase it's food, the faster it will grow. LMB do the best if they have a fish that is approimately 1/4 to 1/3 it's body length to eat. More calories in for calories expended catching it. I've heard of ponds down South being stocked with a LMB/BG or CNBG ratio of 1/30.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).