It's been a bit since I read it, but I recall the meaning overlap/double meaning between leader -arch (such as plutarch) and arch- from archaeo- was directly intentional word play in the book trilogy, and yes that leader -arch meaning does add spice to the neologism.

(I don't think Destiny does much with the playful dual meaning, though. Certainly the cryptarchs in Destiny have never yet been meaningful leaders.)