Profit-Switching Mining Pool

[ptanmay143]

I am currently getting bitcoins from faucets and doing tasks. I have 0.00011506 BTC already. I am thinking after getting about 100$ dollar worth bitcoins will be collected, I will buy a Raspberry Pi and few block erupters and start mining. Which pool should I go for? I have heard about profit-switching pools. Can you suggest what should I do now?
And if you are willing to donate even small donation here is my bitcoin address
1PSkWDpgjGpnMkRJp6zMKsUaTpBVMv9CXt