Here is how I rank them:
1. Sentai Choreography
2. PR Choreography (Saban-era)
....
1000. PR Choreography (Disney-era)
Sentai Choreography is more fluid and intense. Also, the explosions are used at the right places. Sometimes it gets cheesy, but that is bound to happen. The fights usually go with the storyline and help it move along. Even the unhenshined fight scenes are okay.
Saban-era Choreography was great for the actors, but early on, during like MMPR S2, the American-footage of morphed fight sequences kinda sucked. But, from Zeo to Time Force, the morphed fights always seemed to fit right, like the Sentai footage. There weren't as many explosions and wire-fu. The wire-fu usage was a few and far between, and the stunt actors were really good. Also, the director and choreographer actually looked for actors who could fight to some degree and it really showed what the company was looking for and what they were aiming to achieve. It made the entire show more believable when you see the actors fighting, then they morph, and continue to fight. For instance, Rocky is much more convincing as a Red Ranger than Mack because of the fact that he can fight, bringing a continuity to the mix.
Which brings me to the Disney-Era choreography. I cannot think of a good reason as to why Koichi (who is really to blame for the explosions that have been nick-named "Kalishplosions") uses soo many friggin pryotechnics. They are totally unnecessary about 80 percent of the time, and are always placed in the wrong position, taking away from what little reality this show is based on. When a ranger is fired with a laser, we don't need to see 4 perfectly lined explosions 50ft away. just a few sparks on the suit will do fine and gets the point across. The wire-fu is annoying, but its mostly due to a mis-use of the technique. I mean, it was used in many HK movies like Fearless but when it was used, it was used in a way to sort of enhance the effect of the move. Not to totally go against reality and have someone flying in the air for 30 seconds for no reason at all. If it is used right, the choreography would be greatly benefited. And, I believe that the stunt people used are really talented. They can pull of some insane moves. It is the choreographer and director that is totally misusing their abilities. Thats why most of the fights look out of place. And the fact that the actors cant fight doesnt help. The stunt doubles are used profusely and have to constantly cover their faces in every shot. It gets tiring very quickly. If Disney just toned it down a few notches, the show would be more tolerable. I mean, that is why we watch it right? For the fights. If they suck, then whats the point.