Plz help to root micromax canvax Nitro a311

i have tried many rooting softwares as mentioned in your forum like kingroot.kingoroot,frameroot etc but all have fail
i have currently android 4.4.2 In my device
i can run it fast download mode(but not in recovery mod)
tell me if i can root somehow by installing superuser or cwm in fast boot mod
plz help really important