This is a map that I don't believe rewards defense as much as it does attack.  For that reason only delta squad will have a Plan-B defensive strategy. 

Alpha Team
[1] Assault (kar) – take the quickest route to the middle flag and at the beginning of the round try to be the first to cap it.  Hold and control the third flag road until our sniper can get into his stage two position and take out any enemy snipers.  When [5] is in a covering fire position, advance and provide [2] with some rifle cover.  Make use of the bombed-out building for cover. 
Responsibilities: cap the 3rd flag; advance and provide rifle cover for [2].

[2] Assault (stg44) – take the quickest route to the middle flag and using what cover their is (sandbags, stairs) provide suppressing fire.  When [5] is in a covering fire position, advance to the bombed-out building situated just before the fifth flag.  Ambush the next enemy wave that comes through and attempt to cap 5th flag. Go on to spawn camp until all the flags are captured.
Responsibilities: cap the fifth flag; spawn camp.

Bravo Team
[3] Assault (stg44) – take the main route to the middle flag and go through the window into your stage one building, clearing out any allied inside. When the first enemy wave has been killed, go through the two-storey building (watching for snipers) and on to cap fourth flag with covering fire from [4].  Advance onto fifth flag and attempt to capture.  Go on to spawn camp until all the flags are captured.
Responsibilities: cap fourth flag; cap fifth flag; spawn camp.

[4] Assault (kar) – take the main route to the middle flag and go through the window into your stage one building. Use the windows to cover the middle flag and snipe the allied sniper window.  When the first enemy wave has been killed, follow [3] through the two-storey building (watching for snipers) and provide covering fire.  Cap fourth flag if not already done and move up to snipe through from the building overlooking the allied fifth flag. 
Responsibilities: cover the middle flag; hold fourth flag area..

Delta Team
[5] Support (kar/sckar)– get to the middle building as soon as possible and hold it. Stay in constant convo with bridge team and attempt a simultaenous attack with them to take out any snipers/mgs located in or near their 2nd ftag building.  Move on 2nd flag and take up an ambush position.  If [6] is unable to take the last flag, attempt to cap it with bridge team.
Responsibilities: cap 2nd flag; hold middle building; cap 4th flag.
Plan-B: Should we go to Plan-B, cover our first flag from one of the windowed buildings until we control our flags and the middle flag.

[6] Assault (stg44/mg34)– take the left flank past our second flag and take up a position in the passage leading out onto middle flag.  When a majority of the allied have died, go out and through the two connected buildings.  Take up an ambush position before advancing to the bombed-out building situated just before the fifth flag.  Ambush the next enemy wave that comes through and attempt to cap 5th flag if not already capped. Go on to spawn camp until all the flags are captured.
Responsibilities: control 2nd flag; cap 5th flag if not already done and spawn camp.
Plan-B: Should we go to Plan-B, take up a defensive position on the first flag until we control our flags and the middle flag.  You may want to switch to an MG for this!