There are lot of factors here you should consider:
- If you are in Canada, how long is your visa valid?
- If your future wife is in Canada and how long is her visa valid?
- If you are applying from your home country then my advice would be to wait and re-appear for IELTS and include your future wife in your application and apply together.
- Re-calculate your score and if you think its low then apply for the provincial nomination.
- Applying together will save you a lot of work, sponsoring a spouse later is a lengthy process compared to express entry.
Hope it helps