In a format where your commander will decide almost every detail of your deck, it is a bit strange to talk about staples
Probably the biggest downside in comparison to Mother of Runes is that the card cannot target itself, otherwise, I'd say it's mostly upside compared to one of Magic's most famous moms
But some, like Starnheim Unleashed, have even bigger effects when you foretell them
Whisper, Blood Liturgist has some advantages and disadvantages compared to that card
If you dont value that or if you are trying to accomplish a different goal by supporting Reanimator, Id say that youre fighting an uphill battle
This makes infinite hasty Mages, which can give you the satisfaction of winning through combat, if you wish