Yo Mr Cross,
Been a sand user since gen 5 and try to build a sand team every meta and can usually hit top 20~
This gen has been cooking me. It's hard for me to build a sand team that has a defensive enough core that can also handle corv... last gen I had Zolt but he's been deleted.
https://pokepast.es/652d13ad17d07d07
This is the best I've gotten so far, currently sitting at 1800. (Ive tried Wisp/hex pult and trick wisp rotom, but it seems I need the specs blast and tbolt damage from the two to deal with Corv). Ive tried Terra Blast variants of Exca but just didn't click it enough, and most of the time just wish I had the EQ boost.
You got any advice? It's a solid sand team, I think you should try it out. Clef and Mandi both being immune to sand feels really nice and scarf Terra electric tbolt from Rotom is an underrated win condition.