I thought of some interesting ways to kill a Z Senshie so as to make them not look omnipetant. But then I rememberd how dbz functioned and they'd just find some way around it.
Plan a) Wait till they're asleep and shoot them in the head.
Sounds good right? Afterall, they're asleep, won't see it coming, saiyans sleep like logs. But unfourtanately, they probably are "so strong" that like Superman, bullets bounce rightoff them.
Plan b) Poison thier food.
As much as saiyans eat, if you poisoned everything they're bound to die right? Maybe.. thier bodies might be "so powerful" they're grown immune to most poisons, or they might be able to focus thier ki, grow that cliche blazing aura, and fry the poison from out of thier system.
Plan c) Push them into the room of space and time.
Makes sense, but this is highly situational. How'd YOU get on Kami's Tower? Are you "strong enough" to push a saiyan without it being like just running into a wall? This depends on if we count after Freiza saga (which I don't) or not as well. If we do, the room of space and time is already destroyed and thus, not an option.
Plan d) Implant bombs in their food.
Like what Mr. Satan did to Buu but little mines inside the food itself. Saiyans can't regenerate, but they're so powerful I wouldn't put it pass them for the bombs to merely give them indigestion and be forced to hear the one liner "that's a spicey meatball!" as my punishment for trying to kill the protagonist.
Has any one ever see the DBZ live action movie?
http://www.youtube.com/watch?v=G5fXvxW44wA&mode=related&search=