Instead of reworking blob, again. Consider this...

[Silvercloud29]

Some additional thoughts. Extra energy used to summon the controller can help make a bigger shockwave (SHOULD have a max cap though) how wide of an area the shockwave spans should be up to the coder that sets up the system for balance reasons. As for the (working name for the post) flock guardians (Not a great name I know) they are more durable and have more abilities to help defend or offensively attack, but cannot convert energy as well as drones can and are a bit slower as well. So upgrading all your drones isn't a great idea.