[ShockerCon]

I'm giving the edge to Engi- I mean the... High Octane Megazord. I just feel it would be better in this scenario, because compared to Thunder Thunder, it has a pretty significant arsenal advantage. All Qiden Shorai here has is a sword and a spear that he never used in the show. Meanwhile, Engine Soul Set has a sword, a shield, and 3 additional combinations(by the rules stated in the OP), two of which grant it ranged combat. I really feel like the Thunder Megazord is only winning based on Nostalgia-Handsomeness.