Omigoto...
Btw Senjutsu is translated as "sage-technics" in naruto, another one could be Senpō "sage-arts" but its not been used here. The context for a "sage" is that its someone who knows a WHOLE LOT, so you have magic sages, martial artist sages, warrior sages, etc etc... its does not matter which discipline or art the sage has mastered as its not a "class" but a "title" for someone who's at the peak of knowledge for that particular art or discipline.