Seer of Doom is makes a best sapper. Since they see all the mines on the minefield no matter how well are they hidden.
Personally, as a Seer of Doom with a Staff, I would just sort of do a spell in a straight line wherever I’m trying to go and blow up whichever ones were going to be in that path before walking through.
Or you know, if it’s my Dream Self or God Tier Me, hovering is a good option.