PBS dependant Visa English Lang requirement

Hi All and Respected Gurus,

I am Arun Currently residing and working in London with a Tier 2 General Visa. I am Getting Married Next month (Feb 2014) and Until now I am unsure of many things regarding PBS dependant Visa. Can any one of you help me with the following

1. English Lang requirement : is it necessary for my wife to show the eng lang proof through IELTS or is it enuf that we use her BE Degree certificate from Anna University India ?

2. Bank Statements : Can the maintenance money be in my wife's account for 3 months period and use that as Maintenance proof ?

3. Tenancy Document : this is really confusing I have not seen anywhere in UKBA about the Tenancy Document ? is this definitely required ?

4. Should I use online application form and take print out of it If she is am applying from India or should she also fill VAF10 form

I will be very thankful to you guys if you can help me with these above questions

Thanks

Can somebody help me please ?