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Given the following post, respond as if you're commenting on Reddit:
human
[Power Rangers] How powerful exactly are all the main villains in each Power Ranger series?

I’ve been wanting to knows for quite a while.
gpt
In general we can presume that they're stronger than the monsters they sent individually, but not strong enough that they aren't risking their own lives fighting the rangers

MMPR: Rita is a witch with various magic abilities, but doesn't fight at all. She did use her magic wand to blast Divatox, but that was effortlessly caught by Astronema. Zedd was better, where he can defeat Tommy Oliver rather easily, but retreated once his staff was broken. Serpentera, his zord, can destroy a planet, but runs out of power fast. Lord Vile can create powerful monsters way stronger than Zedd's or Rita's, but isn't seen fighting.

Zeo: King Mondo, even with his Damocles sword, was defeated by the Super Zeo Megazord, so more powerful than the average monster, but not the strongest.

Turbo: Divatox can teleport and have eye lasers, but also rarely fights.

Space: Astronema has fighting skills on par with the rangers. Dark Spectre took two planet destroying missiles before dying, and can launch a civilization wiping meteor through telekinesis.

Lost Galaxy: Scorpius took on all the rangers at once, but was killed by sneak attack by the red ranger. Trakeena, after training, easily defeated the red ranger, and her upgraded form survived a point blank hit by a battlelizer.

Lightspeed Rescue: Queen Bansheera has various magic abilities, and in her second form can summon a city destroying tidal wave. She was killed by her own demon underlings when she dropped into hell.

Time force: Ransik can fight the entire team by himself, but held back by his sickness.

Wild force: Master Org final form nearly destroyed all the zords and can regenerate as long as his heart is intact.

Ninja Storm: Lothor can take on the rangers by himself through martial arts, but was defeated by Mesogog.

Dino Thunder: Mesogog final form can absorb energy and multiply, but there's a limit.

SPD: Grumm can defeat the main five rangers, but lost to the shadow ranger one on one.

Mystic force: Octomus can travel through time and devour magic, but there's an upper limit until he explodes.

Operation overdrive: Flurious can freeze an entire city, and took two point blank attack from the battlelizer.

Jungle Fury: Dai Shi final form absorbed the powers of all the masters, who blew up all his monsters when they combined their powers.

RPM: Venjix defeated the main three rangers, and can delete people from existence until he was hacked.

Samurai: Stronger than all the rangers, and suffered zero damage from their attacks, but has a weak spot, but still took multiple attacks that could one shot other monsters on said weak spot before dying.

Haven't seen the other seasons.