How to make a Sonic Boom! (Tutorial)

Uh, you definitely don't want to use a global variable for your positioning, a local variable works fine- if you use global, it shouldn't reset the position after each attack. Also the look x/y/z position should only return the correct position if the entity is looking at a solid block. Are you sure this works?

Okay, fair enough. Maybe I'll have to give it a try, this could be a pretty cool effect!

While I haven't personally tested it, I assume that if you're using a global variable that doesn't reset, the distance between particles will gradually increase, and will be altered whenever any player interacts with the entity, not just for each individual player. I get why you're using a global variable, but you could also make separate procedures for the damage/particle effects t that have the delay built into them, or used as a custom dependency- that way you could still use local variables without it being incompatible with the wait function. (Or you could just use an alternative method of timing, like an NBT tag) If you're resetting the global variable with a different procedure, it'll work fine as is, but if so you might wanna include it.