Brumby Runner
Jason Little (69)
Presuming we have Pocock and Hooper starting whatever the rest of the selection:
1/ If line out is your driver, choose LSL (Lukhan Salakaia-Loto) at 6
2/ If line bending is your driver, choose Naisarani at 8
3/ If you want a halfway house, choose Dempsey at 6.
I'm OK with Naisarani, I'm just not bought into his line out prowess. I'm also unconvinced on England's line out ability in 2019. So I suspect I would start Naisarani - use him in the lineout and be prepared to throw long to Hooper as well. And have LSL (Lukhan Salakaia-Loto) on the bench in case it goes pear shaped.
I agree pretty much with your points 1/, 2/ and 3/, but the question was related to who is better than Naisarani at 8, regardless of whether he has been an asset or not at the lineout.
My argument is that Poey isn't as good at the lineout as Isi whatever Isi's form atm, and also doesn't carry the ball in contact as good as Isi. Playing Poey at 8 would likely diminish both the lineout operation and the forward attack around the ruck. He would certainly add more involvements at ruck time than Isi, but that is another question.
Similarly, Dempsey is simply a different style of player to Isi, and probably wouldn't add to the lineout which I understand is the main complaint against Isi. I doubt also that he would be any more effective than Isi carrying the ball and certainly not as good at managing the ball at the back of the scrum. So, again, I don't see any advantage to be gained from playing Dempsey at 8 over Isi.
There are arguments to be made in favour of Pocock or Dempsey playing at 6, but Isi is our stand out option at No 8 and should be starting there against England. As for the other spots, I do think we have a much stronger lineout with LSL (Lukhan Salakaia-Loto) at 6, and there is no doubting that Pocock offers a lot more than Hooper around the ruck and is also the leading tackler for the Wallabies in the WC. If a strong lineout is the aim, then the backrow should look like 6 LSL (Lukhan Salakaia-Loto), 7 Pocock, 8 Naisarani.