descriptors - fast and slow updating ones?

[NitroGlycerine]

When looking into the details of how my bot behaves if have found out that the descriptorfields which I am using normally are updating at a rather low frequentie. I found other descriptorfields which are updating at a higher interval and thus yielding slightly better data for decision making. The offset from the slow updating ones to the fast updating ones is (in the situation of the character I am currently using) -0x2A98

Is anyone aware what those other (fast updating) descriptorfields actually are? And why are they typically not used? Or have I been using the wrong ones the whole time?

I would be grateful if anyone could enlighten me.

[Jadd]

Not all descriptors are updated until our client requests an update from the server or meets some other conditions. See MIRROR_FLAGS.

[NitroGlycerine]

Not all descriptors are updated until our client requests an update from the server or meets some other conditions. See MIRROR_FLAGS.

Could you elaborate a bit more on how the MIRROR_FLAGS play a role in this? Thanks in advance!