if you want to try again then use this recovery (http://)en(dot)miui(dot)com/forum.php?mod=viewthread&tid=282773&highlight=Cofface or upload your boot.img somewhere i will cook it for you.
No you need to cook boot.img from miui rom not TWRP follow this thread (http://)en(dot)miui(dot)com/thread-249666-1-1.html ( cant post Links...)and flash newly created boot.img via fastboot mode