Equipment Choice

Hello
I have been choosed to setup 3 links but i need some help on quipment choice.

For the setup im thinking to use 1 rb411U with R52nM card with 2 directional antennas 23dbi for the AP (Point A)
and 1 rb411 with r52nM cards + 23dbi Directional antennas for each of the B and C points

is this setup correct?

My goal is to transfer internet from Point b to A and C - in this case i guess i will have more latency at point C
or its better to have the setup : Point A to B and C ?

The distance between links is about 5 klm

Thank you in advance