Your are trying to fit a filler item into your set. The item alone is not useful but let you remove another piece with accuracy to get more crit than you have at this moment, or also, get more main stat and secondary.

You can blame SE for put that shit stats on eso boots. Just you should try to go alex 2 savage and get gordian casting boot which have Acc and crit. And another useful stat => Vit.

Nobody forces you to spend your eso tomes in a piece you don't need.