If used correctly any deck can get you in the top 150. Your stratagie with that deck would be to ko your opponent with more then 12 lifes to get bonus points. Theres no point having slyth and grim in one deck. switch grim with jay. wemdy with mindey to make opp pill.
Yeah i agree to growing.. use fast killer cards.. like 2 HKO
Your piranas are fine but dont use pussycats for tournaments. you want to win fast and they are mostly for defence. use piranas and jungo