My tool basically does this:

Cluster 1 =>

	Host 1 	
		(execute task sequence)
	Host 2 	
		(execute task sequence)
	Host 3 	
		(execute task sequence)
	Host 4 	
		(execute task sequence)		
	Host 5 	
		(execute task sequence)
	Host 6 	
		(execute task sequence)		
	Host 7 	
		(execute task sequence)		

Cluster 2
	
	|
	|
	|
	|
	v

Cluster 5