Why should they need prayers? Does God decide what He Will do based on how many prayers someone receives? Where does it say we should pray for ‘fellership’ or to express love for feller human beins?
Love is a verb, one of those action words. What is it, if it is not put into action? You don’t want to use the word fellowship, try communion.
Praying to the saints without praying for them would be only half an equation that could be considered a communion of saints.