Divinity has always been the only reliable way to stun overloads, and I'm starting to think that's intentional. I can only hope the seasonal overload trace rifle mod makes the rest of them as reliable, even if only temporarily.
I have not tried the trace rifle one. Guess it couldn't hurt. But still, that's not good design overall, especially considering it's a raid exotic. Really I hate the champion system in general. Don't like being forced to use certain weapon types because a couple enemies in an activity can't be dealt with otherwise. But being locked into only 1 exotic weapon to deal with the worst of those champions is just Bs