[Shiftin]

i don't know what level you are, but when they start proccing you are going to have major aggro issues using 2.

Gloomwater Harpoon in main hand (can get for 300 in EC) and do the burning rapier quest for offhand. It's kind of a right of passage for a rogue and a very solid weapon pre-planes. (google "rogue redemption" safehouse for a good walkthrough).