this is the state I have now:
No vlan's or something yet.
What I have troubles is with at the moment, I can't reach the luci webpages for the two AP's connected as WDS clients, is this normal? The hosts (hostname or ip) are also not reacting to pings 
EDIT: Looks like the reception for the 5ghz AP (down left on the picture) is just to weak to keep it established.
For the one up right I can actually ping the client which is connected to the ethernet port successful - but the AP itself is not reachable