No, I mean max Demolition with SE should be doing around 200k (5000% of a range of 4kish?) damage on average by the time you get it. That, is overkill. You don't need your minimum damage to be so high that you're guaranteed a 1hko with 0 crits.
Edit: Keep in mind you're already doing damage to stun the monsters, and that Buccaneers won't be highly wanted for their DPS at bosses anyway. They're mostly helpful for Time Leap (at least while the main DPS classes at big raid bosses are BMs and NLs, neither of which are affected by SI - could change if we start seeing a lot of Corsairs joining the ranks). A 14x Buccaneer isn't going to be in high demand for anything but party skills at HT, regardless of whether they have maxed Demo or not.
Edit: Keep in mind you're already doing damage to stun the monsters, and that Buccaneers won't be highly wanted for their DPS at bosses anyway. They're mostly helpful for Time Leap (at least while the main DPS classes at big raid bosses are BMs and NLs, neither of which are affected by SI - could change if we start seeing a lot of Corsairs joining the ranks). A 14x Buccaneer isn't going to be in high demand for anything but party skills at HT, regardless of whether they have maxed Demo or not.