Kanna or Rue for Depression

Just as the title says, Kanna vs Syrian Rue. Swim has been using weed for medicine, but he says that it is moderately addictive in a psychological sense. But he wonders if it is the substance that is the problem, or himself. The herb, with its lack of physical harm, and ease of access is just so easy. But with it he lacks satisfaction. He told me that he loves smoking it, so he might just mix whichever supplement (rue or kanna) with it so he doesn't have to walk around with an empty wallet constantly. This might give him the satisfaction and euphoria that he's been looking for without having to give up his favorite pass time. His options are:

1. Mix whichever supplement with weed as to potentiate and make his stash last longer. (Which would work better? He knows you don't usually smoke rue, so he fears that if he eats/drinks the rue he'll smoke just as much weed as he does now. Perhaps kanna would be better for this so he can use them 1:1, or some such ratio.)

2. Quit smoking weed for the most part, and use kanna or rue on a near-daily basis.

Thanks in advance, and if you have any other ideas that swim may find of value, please share.