Changing timed wave, er, timing?

You can do overlapping waves by using just timed waves (not elimination) and firing Custom Events at the end of each wave that has various delays from whatever spawners are listening to it.

Also, you can modify BulletML to use PoolBoss if you like.

Not that exactly... I give one wave 5 seconds, which at full speed is plenty for all the enemies to exit the screen after they're fired/spawned. But if the device is slow, the next wave's enemies are coming in before all the current ones leave. So it seems that while the rest of the game slows, the wave clock is running normally.

I also got the kit to link BML+PoolBoss but couldn't quite figure it out at the time -- the pool recognized the enemies but the firing/spawning happens in BML so (apparently) they weren't recognized by the Elim wave. But I'll admit that's worth another look.

Just an update for anyone else who may share in this:

My solution was to use a Syncro Spawner Listener to track "Wave Finished Spawning." I attached it to the last-spawned spawner in a wave. So once it spawns, another script/FSM pauses LevelWaveSettings, then gets the counts of the enemies/bullets that spawned ("Pool Boss Item Spawned" in PlayMaker). If anything's still onscreen, it waits a second and checks again, then once it's zero (i.e., everything's despawned) , it unpauses and goes to the next wave. 

This doesn't fulfill my wish (keeping all spawner timings even WRT performance), but I'm satisfied that it does solve the overlapping waves. Multiple spawners within those waves can still overlap, but that's more workable. And yes, a LevelWaveSettings listener to track completion of the whole wave would work just as well, but I update a GUI number at wave change and would have to pause *that* before everything else is ready, so, either-or.