Larai, the Appraiser and Display of Knowledge result in 6 additional opportunities to draw Chalice. As multiple Chalices are not needed, two of them are enough in this. Staff of Stories is there to be the first draw by Larai and as additional card draw when you have established control. Staff of Stories is not the strongest card, as it is weak to burn and fliers, but it is the best 5-cost relic to fetch with Larai.
The ShiftstonedEternal Power Calculator is a deck-building tool that visualizes your odds of drawing enough Influence and Power based specifically on the cards found in your deck.