You're still talking hypothetical, wouldn't it be like this if it were, and so on. I look at what they can do and the basic luffy is clearly superior. There is nothing more normal than comparing the endurance of the Seraphim to the kaido. Seraphim have the greatest stamina in the OP universe, they can't take damage unless they put out the Moon Flames and no one can hurt them, you forget that the author of this series is Oda Oda decided that Luffy should use Gear 5 there and drew it that way because they needed to see him in that scene. Actually, there is no need to mention all this, luccinin didn't stand a chance against Gear 5, he didn't even manage to resist, this difference normally shows that lucci can't fight g5, luffy's comfort in fighting Saturn in the last episode is very revealing achievements, but if it needs to be clearer, I don't understand how strong you think lucci is, even luffy's g4 form before onigashima is at yc1 level,
So how can you think that luffy needs G5 over lucci?
So how can you think that luffy needs G5 over lucci?
It was clear in the g5 vs Lucci fight that lucci simple was dominated because he lacked the idea of ehat g5 can do and was confused on what the form was or does. Infact there were several scenes with them clashing. It wasn't until luffy started doing weird stuff that lucci was defeated and in the end he still wasn't koed since in the next page he was up in base while luffy was an old man and had to literally be carried by chopper.
Infact your point doesn't even make sense since again it was doubled down by oda. Why did oda draw g4 luffy in bound man form (second strongest form in terms od destructive capabilities) and paired it with lucci in his second strongest form (regular hybrid form) both attacking the same seraphim with both using their own variet of internal destruction attack? Why simply not have luffy in base user advanced ryou in that scene with regular hybrid lucci instead of having luffy in gear 4? Exactly