All,
I have purchased Mikrotik RB411 and RB433,I plan RB411 as AP and RB 433 to share.Additional I have Hyperlink OMNI 15 dbi and the other Grid Sectoral 24 dbi.Honestly requested advise how to the best design relate to an Antenna I have.
connect the antenna to the RouterBOARD 
they complement eachother. RouterBOARD can’t work in wireless mode without antenna.
…and then 15db omni to AP(RB411) and 24db grid to client(RB433).
The 433 is a more feature/option rich RB, perhaps you may consider using at for the AP instead.
Thank for your support,I will follow as above mentioned and will keep track what I doing and what the result will be to share later on