Yet another light-sleep Q&A: UDP, RTOS SDK and TIM

[malachi]

OK after a lot of reading, I am employing light sleep using RTOS SDK v2.0

Unfortunately, I can only produce two scenarios, neither of which are suitable:

a) Non-forced light sleep, where current draw fluctuates between ~15-70ma.
b) Forced light sleep, where current draw is very low indeed, <1ma, with some spikes, but I miss all incoming UDP packets

Documentation indicates a light sleep of < 1ma is possible with periodic TIM checking, so that we don't miss packets. However, I can't find anyone who has succeeded in making this work. Can anyone provide guidance? Thanks