Belle of the Brawl
*Possible with extreme caveats and in a sense so limited that it wouldn't be viable for combat. "At mid-to-long range against one enemy" isn't functional when battlefields are full of hundreds of enemies at close range all firing at once. Jedi fell to that kind of thing. Droids attempting to be lightsaber wielders would be swiss cheese in seconds.
Here's a viable alternative: install a ray shield on your droid. It works for droidekas. A droid using a Djem So with a lightsaber and the ability to deflect blaster bolts without having to see the future (because of technology, rather than "skill") would be pretty much a reasonable facsimile of a Jedi-level threat.
Of course, you could go one better and just give that droid a rocket launcher.
Here's a viable alternative: install a ray shield on your droid. It works for droidekas. A droid using a Djem So with a lightsaber and the ability to deflect blaster bolts without having to see the future (because of technology, rather than "skill") would be pretty much a reasonable facsimile of a Jedi-level threat.
Of course, you could go one better and just give that droid a rocket launcher.