Need help with what dispatchers i'm supposed to use.. So far I tried:

runBlocking {
            launch (Dispatchers.Unconfined) {
                // check every x seconds if file exists, if it does then kill app (and all other coroutines)
            }
            launch (<http://Dispatchers.IO|Dispatchers.IO>) {
                // every x seconds send metrics to server
            }
            for (i in 1..Runtime.getRuntime().availableProcessors()) {
                launch (Dispatchers.Default) {
                    // use remaining cpu/mem resources to process batch items
                }
            }
        }

running this means that when all available processors are doing work, the jobs which are supposed to run every x seconds never run, how am I supposed to get them to run regularly regardless of if available processors are performing the batch work?

You need to design your coroutine usage to be cooperative