Rack 2-4 play automatically, you got optimal dynasty. But with 6x5, 5x6 in rack 1-4 you still need 4 of both to fully snake them - that is the problem with this strat. You will often get less than 4 and your score will suck (especially if other players fully snake 5s76s with just 3 of them) and you did this to be able to get 4s as your major chain, which is the least scoring number.
Rack 5-8 I think are played fine. I can't help but find it terrible to have to place the 6 in that spot in rack 5, because you immediately block your 5-chain. if only 4x5s appear in rack, you have botched it.
If you would have played 6s in the bottom, as I said in my previous post, you would have been able to put the first 6 in the bottom to connect with the others and have all dynasty options still open. In this rack 5 you restricted your options for 5-chain. The idea of Dynasty strat is to be flexible and keep options open.
In Dynasty strat, this rack 5 needs to be played as such:
To keep all options open.