Make a ~ 6/30 STF, get a +3 dagger of any sort and a decent shield, and go on the duel server. You will likely outperform your main character.
The only situation that causes serious problems is people that are really good at kicks. Otherwise, you will kill people in roughly the same number of swings as you would if you were 21/18 with a longsword; pierce plus speed bonus from high athletics does insane damage.
It's not a particularly viable build in battle or siege though, since you will mostly die from teamhits/random projectiles/etc. But it is EZmode for duel server.