Mutual fund diversification

Hi Sir, I have been through your articles, and they are very useful and reflect your expertise in this field and dedication.  I would like to be advised on Mutual fund diversification, as too many schemes create a lot of confusion. I am 25 years old and unmarried. I have to start investing in mutual funds with SIP and have no. of goals or targets in mind. 1. Short term, for 2 to 3 years. 2. Tax saving. 3. For more than 10 to 12 years. 4. For the retirement etc. I am thinking of going with followings. (Not in any order) MULTICAP FUNDS: SBI Magnum multicap fund OR Birla Sunlife OR Icici prudential multicap ELSS: Aditya Birla sun life tax relief DEBT FUNDS: Icici Prudential long-term plan BALANCE FUNDS: Reliance regular saving fund (Or any other better acc. to you) LARGE CAP: Icici Pru focused blue chip equity fund SHORT TERM DEBT FUND: (SIP my father wants to invest in, need it after 18 to 20 months) Kotak Flexi Debt – Plan A OR Aditya Birla Sun Life Short Term Fund-Direct Plan Would like to have your opinion and suggestions on this. Which funds and what needs to be changed here. And also how much important CRISIL MF rank is? Thank you and really appreciate your valuable time. 