As far as, I know. Rpi B v1 draws 700mA (at max) for powering up its own processor, GPU and other peripherals. (excluding USB devices, they directly draw current from the source) Rpi 2 and B+ is said to consume even less for this part due to changes made in its power supply.
[Ref : https://learn.adafruit.com/introducing-the-raspberry-pi-model-b-plus-plus-differences-vs-model-b/power-supply]
Also, a Logilink nano wifi or any that sort of nano wifi adapter draws typically 100 - 150 mA. (Logilink adapter draws 130 mA typically. Ref : http://www.logilink.de/media/datasheets/WL0084B.pdf page 2:specs)
So even with the list of devices you want to connect, it sums up to 700mA (rpi) + 150 mA (wifi) + 600mA (3x NFC) = 1450 mA which is within the current draw limit of pi2, B+ Rpi and hence could be used with 2A power banks.
Since Joan already answered your questions correctly, i don't want to discuss it again. Hope this additional info helps.