I think for success without connecting to an AP that ISN'T Mikrotik you should stick with routed mode especially if time is short. I have had a lot of trouble in the past trying to join non-Mikrotik systems in a psudobridge(clone) mode and it never worked right. Primarily I presumed broadcasts just didn't flow properly which meant DHCP never worked right for example. Without getting too deep I don't think some router's DHCP server liked giving out more than one IP per MAC or they couldn't handle MAC proxy/spoofing. I have been mucking with bridge filtering of late with mDNS and I suspect there is a way to get psuedobridge to work well with clever use of ARP proxy and MAC SRCNAT. One reason I think that is I have seen cheapy Edimax Wifi extenders work just fine passing DHCP (dunno about other multicasts/broadcasts) so there is a trick to it that goes beyond just what psuedobridge does.