Ok, before I answer your actual question, use spiked knuckles instead of hobnail knuckles.
Spiked Knuckles: Attack: 18-26 Hobnail Knuckles: Attack: 6-30
Balance: 68% Balance: 45%
Durability: 17 Durability: 19
Critical: 21% 23%
The hobnail knucles only beats spiked knuckles' maximum attack by 4, while it has 12 less minimum than spiked knuckles. The rest of the grades of spiked knuckles are all better than the hobnail's except for durability, which is only down by 2, so all in all, the spiked knuckles > hobnail knuckles.
Now, to answer your other question,
Two-handed sword, claymore, or battlehammer should do for smash or when you want to hit someone hard with only one or two hits. Spiked knuckles should kill everything in combo in one hit for the most part, and don't screw around with the javelins, they are NOT good.
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