What do you mean with “Аs of course eth1 and wlan1 is in the bridge”? A1,A2,B1 & B2 are separate hardware with internal bridging?
When using the /32 address, the network is used to indicate the ip of other side.
ex /ip add add interface=bond address=10.1.1.1/32 network=10.1.1.2
I would recommend to start with single wireless bridge element (so without bonding) just to make sure it works fine, and later add
See also http://forum.mikrotik.com/t/bonding-wireless/54769/1