Black ops class help?ps3?

i need help creating my custom classes they kinda suck now im prestige 7 and i havent played in sometime and all my classes suck i got 9 slots and i need help remaking them really good so can someone that is good at blackops and has experience help me i wana create halp of them for team deathmatch and half for s&d so anyone please help me on what wep attatchment perks etc...plz and also what would you recommend on button layout tactical or default i play tactical but i keep getting knifed fast and its slower in tactical so what do you play on and plz tell me wat prestige and all you are thanks for helping out