While /k/ or /sci/ would probably know but they would bitch about being asked about fantasy stuff.

I have a character that uses nearly weightless constructs both as tools and weapons. Think something similar to green lantern using hard-light, but with many more limitations, including the things made not having much mass. Like literally being as light or lighter than a single feather.

I am thinking that because the weapon constructs are nearly weightless, manly piecing weapons would work consistently as the wielder can rely on their own weight in the thrust instead of the weapon's mass to generate effective force. With the exception being short curved weapons used on unarmored targets with cuts thrown with full body-weight behind them.

Basically what I am asking is second opinions on weightless melee weapons. Like do you think a near weightless kukri or cleaver would work? A tomahawk? Knuckle dusters?
Or should I stick to daggers and smallswords?

Long weapons are mostly out since being so light would not only make them ineffective compared to normal versions, but also because if used against a resisting opponent the weapon being so light would create major disadvantage in binds, counter hits, and leverage in general. Maybe a sneaky spear thrust could work, but I don't think something like a large two handed sword, most pole arms, or axes would be a good idea as their effectiveness in part relies on the mass of the weapons it's self.