English Language Requirements for Naturalization

OK, apologies for creating yet another thread but the confusion is killing me!

I am going to apply for naturalization next month.

I gave my Life in the UK test in 2012 for my ILR application so I assume I don't have to do it again?
As far as language requirements are concerned, I have a Master's Degree from UK so I don't need to bother about NARIC etc, and just attach my degree certificate right?

I will be applying for my wife's naturalization as well. She also has a Life in the UK test (the old one) so I assume she is good there. However, her bachelors+masters degree is from Pakistan and PBS Calculator does not award english language points for her degree so I guess I will have to sort her english language requirements out. Now one way is to get a letter from her university saying the degree was taught in english and getting it verified by NARIC, but that is going to be a long process as universities in Pakistan don't really bother reading emails etc. I guess that leaves the option of English Language Test? Can someone please advise which test would be best? in terms of cost and time? Is IELTS the only option?

Thanks in advance

Please continue in your other thread