[Shaman] [Enhancement] Maelstrom Weapon on screen effect appears at just one stack

[pamatuf]

WoW Freakz spell link: https://www.wow-freakz.com/spells.php?spell=187880
Character name: Limeskin
Bug description: on screen effect at 5 or more stacks of Maelstrom weapon actually appears at any number of stacks. I believe the on screen effect is supposed to appear at 5 or more stacks so you know when you can cast the affected spells instantly.
Proof: https://imgur.com/a/fuJBLC3