What do you guys do for energy?

I started grinding vyres on my GIM and I've completely chewed through my divine energy supply. I've tried to keep up with flash events and probably do about 40 per week but I'm at a point where I can't augment my sunspear anymore.

I've seen a few bosses drop energy, I think I'm close to being able to do some of them. Is this the meta or do I need to sit at a divine location and manually harvest it?