I don't see what a Suicune tech does. Either its the only thing you have out, in which case if they run a non-EX or G-Booster they just win, or you have other things out in which case they just Catcher/Red Signal around Suicune. Suicune's attack isn't really threatening either. Right now decks only run 1-2 Tool Scrapper, but imo any deck shut down by Silver Mirror should be running 2-4 Scrappers to counter that. The matchup really isn't so bad for Blastoise that you /need/ techs for it anyway.