I'd look for a pedal with a SPD mountin the middle and a bit of a cage around it (like a platform) that way you can get more leverage and if you un-clip in a corner and you don't get back in your pedal first go you still have something to put your foot on and put the poiwer down out of the corner. The clipless one side and platform other side could be good but again if you take your foot off and then put it back on it could get annoying if you put your foot back on the wrong side.

You can use normal shoues on clipless pedals with a cage around them but it is uncomfortable, not very grippy and will be painful ater 20 or so minutes.