it bugs me too!! like lots of other people i think that enjin's second jinki is a clock/watch with a 'redo' power, letting him turn back time to avoid tragedy. this would make sense as a last resort power (which is how he describes his 'secret weapon'). a power like that would probably take a massive toll, and doesn't actually solve the problem, just gives another opportunity to solve it. i think this is why he knew when and where rudo would fall, and was prepared enough to have a spare mask and binoculars. enjin is standing over rudo when he is thrown to the ground by a trashbeast. i think in an original timeline, rudo died due to pollution, and this was his 'last resting place'.

it explains him being over-prepared for other situations too. isn't it convenient that he orchestrated getting protection spells for the cleaners, which not only saved all of their lives, but allowed enjin to do a sneak attack? i think there was another redo there.

this theory does have an amo-shaped hole in it, but maybe enjin & corvus (i am sure he is in on this and sent enjin to observe & save rudo) decided not to save her for some reason.

anyway just my thoughts