I've learned from various sources that the final battle in Xenoblade features a special quick-timed vision tag system, which doesn't get invoked if you out-level the boss by more than 5 levels, due to handicapping.
I'm thinking of downgrading the weapons/armors and going solo (by signaling the other party members to stop fighting), but not sure if it's going to work. Will it successfully bring me on par with the final boss? Is there any other way?