The important thing is to be spinning the opposite direction from your opponent. That usually means left spin, but again, depends on which direction your opponent is using.
For plastics/original gen, th!nk has some great combos over on his site. Just scroll down to “Zombies”
https://www.plasticsdb.com/competitive-combos-list
For Burst, head on over to the Burst Winning Combos list.
https://worldbeyblade.org/Thread-Winning...andard-BST
Any of the World or Vanish combos are a good place to start for left spin
Any of the Wind or Dynamite-F combos are a good place to start for right spin