'96 disco multiple codes

[cmp517]

My '96 Disco SE7 has put up 5 different codes, any insight greatly appreciated.
codes
1316-misfire excessive emissions fault
1193-O2 circuit open downstream
0307-cyl. 7 misfire
0300-rdm. cyl. misfire
0158- high current 02 sensor bank 2
Can anyone suggest a course of action based on experience or better yet actuall knowledge for all of these codes