First what kind of Servitor would need to defended it-self. Since most servitors are made for only one or two tasks.
That said If you wanted to teach a servitor martial arts. One possibility is to create a spy/watcher servitor. Designed to go out and observe one or two martial arts groups. And to absorb the energy and knowledge of the group its watching. The other benefit of this servitor is when you re-absorb it you absorb all the energy and knowledge that it has absorbed.
The other possibility is the attach your servitor to group mind of say the monks or the shin-obi. I would suggest that you use symbolism from the martial arts you want it to know and try making its sigil from the grid of the nine finger cuts (IMG:
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