Defense or Dodge - Here are the graphs

I updated the calculator in my spreadsheet to make comparing two items easier. I will update the OP with a link to it.
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Shadow Council - US - Horde
Xandreth (70) - Prot Paladin - MT
Tyrenn (80) - Frostfire Mage
Saege (70) - Resto Druid in training

So just for clarification i'm trying to estimate some values from the chart.
This will sound strange:
If I got 1000 rating points to spare I would get the maximum total avoidance by putting like 450 in defense and the rest (550) in dodge rating which will then net a total of 22% avoidance?
If I got 1500 ratings points to spare the ideal proportion will be approx. 750 in defense and rest (750) in dodge rating summing up as 30% total avoid?

Well then someone has to figure out how much dodge rating would be ideal combined with 689 defense rating.

One thing I noticed when trying to figure out the numbers that arilink requested, I realized that the proportion of dodge to defense is close to 50-50 across the board, with a slight advantage to dodge. Simply put, aim to get your dodge rating and defense rating roughly equal. Use the calculator for fine tuning.
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Shadow Council - US - Horde
Xandreth (70) - Prot Paladin - MT
Tyrenn (80) - Frostfire Mage
Saege (70) - Resto Druid in training

wtb graph that I can read that uses in-game values
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armory | youtube | pally stole my bike