Questions
Victor Ramos
Do you see any weakness in my Fantasy Team? and Should i start someone else from my bench
QB: Cam NewtonRB: Marsharwn Lynch and Rashad Jennings
WR: Wes Welker and Julian Edelman
TE: Vernon Davis
Flex: Eric Decker
K: Nick Folk
D/ST: Panthers
Bench: Russell Wilson, Broncos, Chris Ivory, Greg Jennings, Hakeem Nicks, and Roy Helu
Greg Jennings 
Hakeem Nicks 
Vernon Davis 
Denver Broncos
Cam, Marshawn, Welker, Davis, and Decker have ALL been cast in some sort of negative light by at least one major rankings/advice outfit. So I would say that's your biggest weakness...you're relying on guys who have been posited to not be very valuable by people who are paid to evaluate their talent (and generally speaking, know how to do so).
But what's wonderful about fantasy is that people, no matter how knowledgeable they are, can be wrong. Hell, even the most accurate analyst over the last couple years (John Paulsen) draft rankings have only been roughly 60% accurate. So if only being right about a guy a little more than half the time is the benchmark for being the best in the business, I wouldn't be too terribly worried.
That being said, in terms of your actual roster composition...I may be rolling with Russell Wilson over Cam, until I see that Cam can get it going on the ground again. A lot of the reason folks are so down on Cam this year is his ankle injury that he had offseason surgery for. If he can't score points on the ground because he's hesitant to run, or doesn't have that power or explosiveness, he's likely going to be pretty dreadful. I also wouldn't be carrying 2 defenses this early in the season, and I'd probably be hanging on to the Bronco's over the Panthers. Defenses predictability to be high scoring hinges on their ability to get to the QB, and the Panthers are without two of their most effective pass-rushing weapons from last season. Meanwhile, the Broncos only added to their already potent pass-rush...I think we see a big turnaround from that unit. I know it's only a Defense, but maybe someone in your league will bite on a trade offer for the Panthers? Thinking that they will get the same production as last year from them?
Also, as far as backup RBs go...I don't know that I like Helu and Ivory there. Ivory may end up being just OK as someone who sees some goal line work, but Chris Johnson has been nothing else but consistently durable throughout his career, so you aren't really sitting on someone who has a high chance of stepping in to starter-level production. What RBs are available on waivers? Any of the current backups who look to potentially have a higher chance of stepping in to a bigger role than they currently have this season? Christine Michael, Andre Williams, James White, Carlos Hyde, Stephan Taylor, Bernard Pierce, Khiry Robinson/Mark Ingram, or Terrance West?