The main strategy of this deck is quite simple. Just try getting Mystic Mine on the field as soon as possible while you use COTOM to slowly burn your opponent. You can also go for Final Countdown.
Gravekeeper's Servant + Macro Cosmos or DF to avoid enemy monsters from attacking if you don't have the field spell yet.
Messenger of Peace for a super bad luck situation in which you didn't get either the field spell or the GS.
I've tried myself this deck with over 95% winrate against meta and non meta.