May I kindly suggest that for Fiancee Visa application you focus on:-
- Financial Requirement
- Evidencing relationship is genuine and subsisting
- Your intention is to enter the UK to allow your marriage to take place
- You and your partner intend to live together permanently in the UK
If you haven't already done so then review this forum thread All New Guide - How to apply for a Fiance Visa as it will hopefully give a good background for you both.
It's crucial that your fiance also understands the requirements....after all most of the supporting evidence will need to come from his side as the sponsor.