I do not think there is a better or more efficient method for a home extraction than rosin. I have tried them all. Except BHO, hydrocarbons are totally off the list. I do still soak the left over chips in ethanol and evaporate that off but is is a very inferior product to rosin.
I then decarb the rosin and make into chocolates. This is a "whole plant" product with very little losses in the process and the effect and flavor are for the connoisseur. It is very easy to titrate because the actives content is consistent within the same strain gram for gram. Using an average 700mg per gram of actives is also fairly consistent accross strains in the tests I have read.
When I do make oil I use Coconut, olive oil and butter. These are all for cooking or salves.
This is a video I made about how I make my chocolates: