Your focus seems to be quite narrow. There are many factors in choosing what battery is best for you. You seemed to be focused on performance. I rank performance pretty low in my list. Most folks don’t care at all about performance because they can’t see the tiny differences in lumens and if they have a device that measures lumens, they may not care about bragging rights.
Factors to include would be:
Quality
Price
Availability
Type (high drain or high capacity)
Performance
The Molicel is great, but it’s only sold at one or two stores from what I remember. We don’t know where Rock lives so he may not even be able to get it if he wanted. It’s also a bit on the expensive side.
I think the 30Q is a good choice for this light because they are high quality, relatively cheap, commonly available and have a good mix of performance and capacity.
You could squeeze out some more lumens with a higher drain cell like the P26A, but is that really important?
If your objective is the longest run time you can go with a higher capacity cell like Samsung 35E or LG MG1 for example.
It all depends on your needs. Just don’t use protected cells in this light as it will definitely hurt performance or may not work at all.