Team

You can't just make one team and expect it to carry you through Camelot. I would recommend that you start using your brain and look up guides for each encounter in order to make a team that will counter it.

I have to agree with DarkBlaze. Completing Camelot with one team would be extremally hard. Checking enemy classes and adjusting your team to have class advantage over them is quite essencial now. I'd recommend to use one support (like Jeanne, Irisviel or someone else from friend list) with two class advantage servants (substituted by berserkers if you haven't got any or they are low-level) and puting berserkers and maybe Mash in remaining slots