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Technically, if you're dithering a few pixels between subs, you can let the camera bloom a bit more than usual. After you've removed the blooms and aligned the subs, you'll find that the dithering will result in minimal loss of details due to the bloom. Of course if you have a blooms that bleed a large amount of pixels, it does create a little more work for you, but still manageable.
Actually, you can salvage most subs with bad blooms if you've got one sub that you use as a reference frame that does not contain heavy blooms. You can then subtract the the details using the reference frame. This is somewhat a tedious task, but works if you don't have the luxury of mega data.
If there is one thing that catches me off guard regularly with NABG camera's is to know the optimal exposure time to get over the noise hurdle, but not introduce heavy blooms. There is no set value you can work with as it depends on what is in the FOV.
Don't leave it too long for another post. Perhaps try some straight RGB's and ditch the luminance for a while.
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