Aaou movie Hawkeye. Your opponents choice, 3 unavoidable or I don't take actions so I never have to clear rings...

Tiamet.

Long shot. Penetrating EE with 3 bolts and everything is a crit.

The thing to keep in mind is that the Power Plant is a resource best used for forces that can make a variety of ranged attacks. You should understand your own play style before trying to use it. For myself,
I am not typically a crazy min-max, and I try not to give myself too many options to avoid "analysis paralysis" when playing, and I typically prefer in-your-grill type play, so it was hard for me to design a force to have fun with the Power Plant.

I used the Power Plant last for this team.

180 (WK Exclusive 022) Wonder Woman
150 (JL Strategy Game 002) Experienced Batman
52 (DC 10th 014) Robin
+10 (IIM R100) Power Plant
+ 2 (IIM R002) Vortex Beam Ring
+ 2 (IIM R004) Flame Blast Ring
+ 2 (IIM R008) Black Light Ring
+ 2 (IIM R009) Electro Blast Ring

= 400 Points

The force played very well, and it mimicked the feel of the issue I was going for: three heroes in the Fortress of Solitude trying different alien weapons to handle opposing forces. This team did use the Black Light ring, which I think you said you did not have. Follow the link to see how I used those particular rings for this force.

I've also tried the Power Plant with a swarm-y force of TDW Dark Elves (a ranged-based force that doesn't have much variety without a resource) but the results there were mixed.

My experience playing against the Power Plant is that many folks will use it to support ranged-attack alpha-strikes with some combination of ring-draining and use of a preferred ring for extra range/targets and/or Energy Explosion/Penetrating damage. You can recognize that strategy by an opponent who hangs back hoping for maximum mobility and avoidance of retaliation. Disrupting such a strategy (easiest done with map choice) can frustrate such forces.

I've never tried it but I always thought WOL041 Parallax would be good thanks to this power:

THE DEATH OF COAST CITY: When an action resolves during which a square of blocking terrain was destroyed, remove an action token from Parallax or an adjacent friendly character that shares a keyword with him.

You could potentially never have to clear Parallax if you played it right. Depending on points, add someone like Tess One (Sidestep and Improved Movement: Destroys Blocking Terrain) and you equip Parallax with every ring and he'll never have to clear. I always wanted to try it.

just have a Hulk or Juggernaut that destroys blocking as they move through it

or a Cyclops that shoots through it and destroys it while doing so

or both and take turns with them

All of the flash chases can have all the rings.

Thanks for all the suggestions, the more I look at it the more fun it seems. Has anyone ever successfully "blown up" a resource before?

Yes and it's game changing. The new Faust is perfect for blowing up resources with his 3 dice attack.

This is why print & play is a bad thing. That said... BRILLIANT!!!

You know... 22 Mary Jane pogs, Alfred, and a Mystic aren't too many points...