It seems like the two opportune moments to respond are when either Flash/Protean Hulk's death trigger are on the stack, or when Kozilek is about to reshuffle the deck. I would really like to respond at that moment, but Memory's Journey messes with that.
Damn.. this problem is making me headache.
Everytime I think I've got something, I notice that it doesn't work.
You would have to deal with Kozilek AND have a counter for
Memory's Journey.
Hmm.. we would need an alternate
Mindcrank. life loss on mill in stead mill on life loss.
/edit:
Bloodchief Ascension could do the job, but you would have to get 3 counters on it before the combo starts, which should be a big drawback.