Speaking of Jedi and Sith, I don't suppose ya'll have any lightsaber forms or types of sabers you really like?
Myself, I'd be inclined towards mastering Form VI, albeit as the backbone for a more personalized hybrid style that mixes and matches the other forms as needed. Indeed, Niman may be too "spread thin" for casual users to really leverage a specific strength or advantage, but as I recall, those who'd actually mastered it for combat use (Exar Kun and Darth Krayt, for example) have proven to be some of the deadliest and most unorthodox duelists in the setting.
Given this, I'd say combat-oriented Form VI makes the best gateway for a "master-of-all-trades" approach, with liberal use of Form II (manual dexterity and precision strikes) and Form V (counterattacks and targeted blast deflection, albeit with more favor for Shien over Djem So) that are complementary and easy to transition between while still being versatile. Maybe Form III every so often, too, if mainly for emergency situations where I need to hunker down and have no easy way out. No Form IV or VII blitzkriegs for me, thanks!