if for financial support, if you have credit cards, should be ok. for sure you will also indicate cash or traveller's cheques since you will bring one or the other. the bank statement is more to having ATM where you can withdraw money also from there. letter of employment, that is more to ensuring you will go back. you're trip personal or business bro ? if it's business, then typically the company will provide a letter to the embassy stating purpose of visit and details, plus if the company is shouldering all expenses for the trip.