about 27uA (Rigol DM3085) @3.2V. It only drops 1-2uA if I disconnect the sensors (all wires towards HTU21,BMP085,VEML6075, BH1750) which is about what the datasheet for those say under shutdown. So most is taken by NRF52. There can be other peripherals that could be turned off still before sleep maybe. Now I only handle the I2C errata and then shut it off before sleep (wire.end), the rest is in mysensors code for sleep.
Sleep current does not change if I don't enable the DCDC. Perhaps the active current does a bit but can't measure it accurately (too fast).
Just estimated that using AA-batteries it should last over 2 years. It only wakes up every 20min and runs about 400ms to send 7 values. But still I'd like to get better.
This is my rain gauge / multisensor under upgrade. It was earlier powered by mega328+NRF24. Worked fine about a year, but then something happened and it started taking 2mA while sleeping. Didn't see any visible reason why.