I would say it's not a good plan but it's a plan, except this is very literally without any sort of plan for what is going to happen
Thassas Oracle This is the big one, in my opinion
For instance, you can cast a sorcery using flashback only when you could normally cast a sorcery
Alternatively, with Steiners built in lifelink, youll be gaining significant amounts of life and can utilize one of the lifegain payoffs like Aetherflux Reservoir in order to win
It just depends on Eiichiro Oda and how he wants to tell the story at the time
If a red mana you add has certain restrictions or riders associated with it (for example, if it was produced by the last ability of Arena of Glory), they'll apply to that mana no matter when you spend it