so far all my attempts at making a compute 3.0 versions have failed (not entirely sure why, resource limitation probably).
Also it must be understood that most of the features which allow to increase significantly the hashrate were introduced later (in compute 3.2~3.5) which means that even if I was able to fix the compute 3.0 version it wouldn’t even come close to what I get with the old compute 3.5 card.
So I don’t think it is really worth it to put effort into that direction.
Not sure where you saw that the 295x2 was the fastest card in the world… (and it is 2 gpu in one card, so it is also twice the power consumption)
and this is a gpu from last year, go rather for a furry X or something like that (but at the moment the fastest card for neoscrypt are still the nvidia)