[MegaBlues]

Generally, buffs like this are considered due to them being long-lasting and usable while neither party is in attacking range.

Even so, as with most games with HP as a mechanic, only the last point matters. Whether you defeat an enemy exactly or with 200 points of overflow damage doesn't matter.

So you have to consider; is this buff allowing you to hit a threshold where you'd need one less hit to win? Is it enabling new options or changing the flow of battle in any way?

. . . Probably not. Which is why a lot of buffs feel lackluster. They logically do not matter. But for buffs that do matter, they're generally disliked because you can set them up for free at the start of a fight with little the opponent can do to interrupt, and with how explosive fights can be, there's a very good chance the battle is decided soon after engaging.