Lord Sidious Destroyed entire fleets with his Force Storm and Luke beat that so Luke>>>>>>>>>Exile
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LIGHTNING storm. He did that with lightning storm. Thatj is a different power. It is almost like summoning a space storm of lightning. He can not really use that power to defeat a jedi. He just has force lightning for that. The exile would force crush them ALL.
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Force Storm
From Wookieepedia, the Star Wars Wiki.
A Force Storm destroying vessels at Pinnacle Base.
"Using this knowledge, I can unleash the dark side energies that are all around us, even to shatter the fabric of space itself. In this way, I have created storms."