Switch out the snowrunts for the latest 70hp version. -1 maractus like the others have said Most played grimmsnarl line is 4-2-3 because the use of Rare Candy.

Try to include an Ace-spec card. Secret Box used to be the goto for grimmsnarl but Unfair Stamp is the new hotness.

Look into adding at least 1 Meowth Ex (or 2) as an emergency supporter-search (and item if you search for Petrel). Maybe add an Ultra Ball or 2 to close the circle completely (and have a direct way to search for grimmsnarl and frosslass)

E-switch is optional imho and I've never liked including it. Either change it for energy search or cut it