Depending on what items are expensive for you, I would say the charms is what kills most poeple. You can substitute the charms with any +Max Damage/ Ar / Lifers such as GC's 10max/70+ar/35+ life or even Large Charms with 6 max/ar/5 dex. The max/ar/dex setup can get like 100-200 more damage but you loose a good deal of life. As I said, this build is for more veterain players so if you can't afford any of this you will be running into problems.
i have a pretty interesting hybrid zon and she kill alot of people. she uses guided arrow and plague java. some other suggestions for cheaper/different gear that seem to be effective for me anyway are for boots i like to use gore riders for OW, CB, and DS. and if u cant afford a 120/45 helm i would use mav's helm it has decent mods and 30 ias so if u socket it you cant get 45. also just for some more explianation of why lighning bolt is effective is because it always hits unless they are a zon to dodge it or an assassin to block it with weapon block.
Think not disdainfully of death, but look on it with favor; for even death is one of the things that Nature wills.
Personally i don't care for anythign dealing with poison. Poison is a newb way to win regarless of it being a skill or items. Either way its cheap by letting you run away and drain much like Open Wounds. At least open wounds is a % and has a stopping point and is based on level. I have seen like 30,000 PD damage zons and Poison Nova Necs, its the most newb thing in the game. Thats just my opinion, if you guys dont mind PD theres an alternative build for this hybrid set up by going less Guided arrow and Critical strike bout 5-10 into each or jsut put 1 into each, then do some poison synergies.