Caverndwellers have found enhanced abilities to fight with stone weapons after spending abundant time in surroundings that these materials are used more often.

How about brawling type edges like. After all, I almost never see any of these skills used beyond low level.

Mischievous Scrapper- A person with this edge has learned to carefully place their elbow strikes in such a way to break or dislocate the jaw of their enemy causing a reduction in the ease of spell casting and a speech impediment for a short time. (Thinking disrupt organ's throat closing type hindering but only an hour or a few rounds)

Spiteful Bruiser- Men and women from more physical backgrounds have learned, through disreputable combat, the means to aim their kneeing attacks at the more tender places in an opponents midsection and can, at times, cause a loss of breath from such painful strikes. (Possible round or two stun)

Kicker's Insight- Adventurers who have great experience in hand to hand combat understand that the legs are the support for the body and have developed a keen understanding of where to kick an opponent's lower body to hamper their mobility or agility. (Drop opponents mv, or -dex)

These could simply also be a conglomeration type edge for masters of brawling.

The Battered Brawler- After an apparent lifetime of unarmed fighting, a master brawler with this edge has gained further insight into landing more hampering elbows, knees, and kicks.