Tankbuster can proc on non-hero targets (e.g. neutral creeps) without resetting its cooldown, but it seems to be the case (in my testing in Sandbox) that after the first proc on each target, you can't proc it again on the same target until you ACTUALLY trigger its cooldown (by procing it against an enemy hero).
So if I want to burst down some medium creeps as Dynamo by doing Stomp -> Echo Shard -> Stomp, the second stomp won't proc tankbuster even though tankbuster is not on cooldown, and I need to go stomp an enemy hero to get tankbuster to activate a second time against those specific creeps.
the testing I did was not ultra thorough so I apologize in advance if I missed anything about how this works
So if I want to burst down some medium creeps as Dynamo by doing Stomp -> Echo Shard -> Stomp, the second stomp won't proc tankbuster even though tankbuster is not on cooldown, and I need to go stomp an enemy hero to get tankbuster to activate a second time against those specific creeps.
the testing I did was not ultra thorough so I apologize in advance if I missed anything about how this works
