just a quick reminder, if you 79 rogue twinks decide to rock the shiv build, you should stack attack power and stamina and pretty much ignore agility/crit rating/hit rating, you also should use a 1.4 sword/mace instead of a 1.3 dagger, because shiv, like most instant attacks, is normalized(2.4 for mace/sword, 1.7 for dagger)
[Furious Saronite Beatstick]
would be your best choice, it's BOE too, so no need to worry about experience/drop rate.
you should also use a fast main hand for more poison procs, I would suggest a good dagger, that way, you can open with ambush when you feel like it.
so
[Lifeblade of Belgaristrasz] would be a good choice for mainhand.