Saturnite super heated fist: Ballistic fist, end of story
Antenna thing: Super sledge beats it in by far damage but not attack speed, still the super sledge is better. Well Id rather have a super sledge than some weak antenna
Proton throwing axe: Yes its better than any other thrown weapon in new vegas
Elijah's Tesla cannon: Easily beaten by the Tesla beaton prototype only thing Elijah has on beaton is the 1 less EC pack per shot
All in all the weapons weren't to great, but the DLC was amazing.