Balancing Diamond Ore-Blobs Sizes

I've explored caves for hours, and strip-mined for most of that time, but every diamond ore vein I've found was less than four in each (most of them being just one...) .  Here's what I think:

• From y(16) to y(-64), there should be gradually growing blobs as you go down, but the RNG factor of it can still have it at a low amount per blob.  Every 16 blocks down from there out has a chance to increase the size of the blob.
• Example from the last point: From y(16) to y(1), blobs can be 1-4 ores big.  From y(0) to y(-15), blobs can be 1-5 ores big, and so on.  I'd suggest at the very bottom, y(-56) to y(-63/-64), blobs can be 3-8 ores big.
• Coming from the last two points, the smaller sizes should have a more chance to be added rather than the bigger ones.  Here's some suggestions on how it chooses blob sizes at the lowest level [ # of ores in blob = chance to get ]: 3 = 35% ; 4 = 27% ; 5 = 20% ; 6 = 14% ; 7 = 9% ; 8 = 5%.

Of course, you can do this with other ores, too.