The one from the turtles (Turtle Claw - Poison) is a solid. Radeka's Thorn (Hydro) is good, but late act 1. Needle's wand is good if you kill Griff and kitchen crew early on. The drain purging wands are OK if you need some fire damage.
Also, tip for you. Use a poison wand in your main hand and a fire wand in your off hand. Often, the main hand will fire first and then the off hand. If this happens and the target has no magical armor, you will poison them and set them on fire in a single attack. This adds 2 DOTs instead of just one.