It seems weapons changed by patch mantains old the old stat if they had a kit improuving that stat on it. But for this analysis I’ll ignore the existence of this kind of weapons.
I use 1h sword + shield or spears (depending of what I am fighting) as my main weapons.
But I also use daggers vs bleeding bosses (a longer time fight allow to appreciate status effects), 2h sword for dps against some bosses and katana in the situations when I could be surrounded.
I like to change weapon even during combat.
I never found online a good math explaination of how many dmg heavy attack deals to make a scientific compairison, but after empirical evidence now I use Predatory Blade as my 1h sword (with the spikes kit to have more armor penetration), I think it’s really good, more powerful than every other 1h sword I ever tryed.
Sword of Crom is obviously the best choice for thrall weapon, because they don’t seem to be affected by its drawback.
I don’t use Lifeblood Spear, but it’s a viable choice: there are now many spears dealing the same amount of dmg but with different additional bonuses, it’s just health regen it’s not my choice for a mid-range weapon.
I choosed to use the venomous daggers as my daggers because I use them just to inflict status effects to enemies in long time fights, legendary creatures usually.
I usually don’t use daggers for all the combat, so I don’t care if they deals few damages.
But in general, if you use daggers as main weapon, The Shank is now the best for me: only 2 less dmg than the Grim (and with a +0,9% of AP), same stats as Snakebite BUT it inflicts bleeding + cripple !
I don’t use The Shank just because as secondary weapon just to inflict status effects I prefere venom to cripple.
I never found the Blade of Seven Winds, but in this case I doubt the 100% armor penetration will be so good to compensate the very few dmg it deals. But as I said I never tested it because I never found it.
Anyway I use Katana only when raiding some specific points where I know I could be trapped into a swarm of enemies, so it’s the katana “heavy attack” mechanic who means in that case, stats are less important for me, because I usually switch weapon when escaped from that situations.
At the end of this… I think legendary weapons from Unnamed City are the best (or = to the best) weapons in many categories of weapons.