Well as far as credentials.
All through BW1 i almost Xclusively played hail (see what i did thar :3)
I was the Elite four representing hail in 2 different PO leagues
I am also now the reigning Xclusive Leauge Elite Four Hail Representative
As for peaks i was able to top the DW ladder with a hail team
I'm not really a ladder junkie so i cant say i have reached some rediculous rank with hail but just ask around about my hail playing skill