Thanks for this list, I did not know reins of vinesteed existed, and i am allready running the altar in my Siona list as a wincon to sac the infinite soldiers. Next chance i get, i Will be dading it to my list.
As budget friendly wincon am also running soul sisters combined with
aetherflux reservoir. You wont always be able to get all at the same time, but when your infinete soldiers get boardwiped before they swing for the win, the infinete life can be put in the reservoir.
Besides that, Siona can also go voltron with aura’s and i also added in
court of grace and Sigil of the empty thrones as alternate go wide options.
I was wondering about the number of lands you run, 32...do you find yourself taking mulligans a lot? I am running 36 myself, and i find a lot of time my hand filled with cards i cant cast because of the insane carddraw of this deck vs available mana