ILR 10 years base and deoendent visa

hi,
it will be much appreciated if some one guide me briefly.
i have got my ILR in 10 years rout in march 2015, my wife still on dependent visa under my old tire1 general visa. we have 2 kids both are British now. i claim following benefits, child benefit, child tax credit and working tax credit.
i am directed in company and getting salary 8400/year.
my wife employee in my company and getting salary 7800/year.
on 3rd of july 2016 her current leave to remain will expire.
please answer following questions.
1: which form we should use flr( m) or flr(o) or flr(fp)
2: income threshold is 18600, can we both can combine our salaries to meet it, if we combines its 16200 we are 2400 short which can be 18600 or more if i add dividend or increase in salary.
3: does the benefits which i am getting will effect on her case.

Unless you financial position changes between January to July, you will have to rely on Ex 1 and use FLR (FP) .

Also refer to Appendix FM-SE.

Obie wrote:Unless you financial position changes between January to July, you will have to rely on Ex 1 and use FLR (FP) .

thanks for your reply, i will consider your suggestion.