Tbh a think if all these crosses are ented right they all can sucseed in being all rounders but as far as the collie cross goes they are the superia lurcher cross. There is more collie cross lurchers around also.
For the saluki there is no other cross that can run hares like them there stamina is on a diffrent level.
Then there is bull xs which people prefer on bigger game because they can handle the stick, the only fault with a bull x is tha if they have had enoughf they will not run