In my playthrough, I ended up not using any silver weapons. They're pretty heavy, and upgrading them is heavy on the silver and gold. Upgraded steel is nice too because they're much lighter and they get a bit of crit.
I feel like Killer weapons are pretty good in this game, their MT is decent is and engraving them with something that boosts crit can give 60~80% crits in regular circumstances on high DEX characters. Most importantly, it is incredibly cheap to upgrade them to +5
Levin sword is really good in this game too, the MT is quite good without being too weighty (looking at you Flame Lance) and is also very cheap to upgrade. Nice to have on people due to the large amount of armored enemies in this game
I tried to make Brave weapons work, but due to no durability the MT was understandably nerfed to oblivion. Could make an argument putting it on a berserker or warrior but that's about it. A General would probably prefer a Great weapon if they wanted to hit hard (and they wouldn't mind the counter-attack). Nova is the obvious outlier since most enemies have lower RES and you probably have a magic user or two that was left behind on SPD