I was thinking of top jayce, jungle xin, mid nidalee, Mf and nunu bot lane, what do you guys think? its good or there is another team comp for pushing turrents and clear waves fast.

I'd replace Nidalee with Heimer, and Xin for Rammus. This provides a nice "wall" defense during team fights and better balances the team. Otherwise, your only tanking prowess is Nunu's soft CC, and whatever Jayce has on hand.

If you can work him into your team, an AP Nasus is an extremely effective pusher. Just be careful you don't get ambushed.

Swap Mf for caitlyn because of her q and her range. I would suggest olaf top for his q or singed. In the jungle master yi is awsome

top: Jayce,
mid: Nidalee/Anivia
bot: Cait Nunu
jungle: Nocturne, ?!?Heimer?!?

well we where thinking of trying to get turrents as fast as possible and disengage really fast, we arent looking for team fights we just want the objectives and get out fast, i dont know if this is possible or at some point of the game we have to fight, thats why we want to rush the game to win it really fast

you're looking for a poke/splitpush comp

Things you want.
good disengage. Jayce, ali, janna,
Long range, lux, jayce, cait, kog,
good splitpusher, shen, nidalee, rengar, shaco, teleport.

These are probably some of the basic things you'll need to run a poke, seige, and splitpush comp.

good luck.

Surprised Sivir wasn't brought up. She's the queen of pushing. Taric or Alistar are better choices for the team because of their kit. Ziggs is a fine choice for mid. He's got great pushing power and good disengage. As for jungle, Maokai would be excellent. I think Singed would be a good fifth to round out the team.

I'm a big fan of this comp:
http://youtu.be/nRAoZJolrYI
(Championship game in tournament play, forget which tourney though)

Wow stop being cruel and add in ziggs