Hi there! Everybody responds to cannabis strains differently, so it's great that your wife has already tried a few. Face off is a 50/50 hybrid with about 20% THC and no CBD; 5th avenue is a very potent indica strain with about 25% THC and no CBD. It seems that your wife responds to high levels of THC.
So, here are a few heavy and potent strains to consider: Grand Daddy Purp Northern Lights God's Gift Chocolate Chunk
However, most strains have been bred to contain the highest amounts of THC possible, which is why most strains -- such as those above, and the ones your wife has responded to -- have very little, if any, CBD.
So, I also recommend that your wife try a few CBD strains. Very high CBD strains, such as ACDC (20:1), will likely not contain enough THC content for your wife. Here are some CBD strains with a more balanced CBD:THC content: Harlequin - a 3:1 hybrid strain Sweet and Sour Widow - a 1:1 indica strain Pennywise - a 1:1 indica strain Cannatonic - a 3:1 hybrid strain
Hope this helps!