its better if u apply ur wife as a psw dependent, its easy and quick to get visa... u got enough visa duration, docs u need are:
Bank statement... 3 months 900£ 600£ dependent, thts the main thing
extra stuff... home contract, landlord statement, ur cover letter, if ur business or work breif intro or docs / payslips in case of job.... ur atested visa copy and front passport page.... thats it.. on her side . u need marriage certificate atested from local counsil in english MAin thing, wedding photos, passport, tb test, phone conversation or any records to proof u guys were in contact... thats it. BEST OF LUCK.