Interesting point, that changes it a bit.The problem for Minato is this:The third raikage KNEW about how he got the scar on his chest, hence it being his life's shame. I see no reason for him to use the one fingered nukite against a teleporter like Minato when he doesn't actually need it to kill him. In b4 someone talks about the gig which Naruto pulled off-the Raikage was being controlled by Kabuto, who obviously had no knowledge of the 3rds weakness. Minato has no way of putting the Raikage down, as he tanked FRS. He wins via outlasting Minato.
You are right, why should he use his hell stab against a teleporter, now the only question which is left for me is : What does genjutsu to the chakra system of the target?
if the 3 raikage falls for the genjutsu, would it affect the maintaining of his raiton amor ?
If not, Minato has nothing to hurt him and The third Raikage maybe snap out of the genjutsu when minato tries to hurt him with Rasengans.
Interesting matchup, i really don't know who wins.