The edge path conditions and low signal strength for KRSU may force you to dedicate an antenna to that lone signal... Before you presume that though, I'd suggest you try 'splitting' the aim of the DB8E to see if it can cover both the SE and NE directions. When splitting the aim, the net gain is less, as is the ability of the antenna to reject interference from off angles. If you can find aim points for each panel that provide reliable reception from the two directions everyone's happy.
I'd point the Y10713 at about 125° to start with... then adjust for best reception of the real channels 8, 10 & 11.
Worst case, If you need to chase down one off angle weak signal, consider using a separate dedicated antenna, cabled to an axillary tuner.
http://forum.tvfool.com/showthread.php?t=2882