Hi Msfujino,
Yes thank you for guiding me down this lower power path, My battery is a 3.85v@450mhA as you see in picture, so the as measured 2.5 uA. almost average is very good.
My main application and device require minimum interaction, albeit a 2-way connection (BLE-CHAR Notify) but the majority of time could be sleeping or low power and mostly monitoring IMU or RTC for INTERRUPTS. As it is now.
Any long periods of Inactivity would switch to low power, until even more inactivity or command to sleep (always with an ability to wake up)
This is very interesting and on the same level as the range possible of the connection discussion.
TY
GL 
PJ