Smite fissure causing fps drops for other player in party

Recently I got an Aurelis on my Forge Guard, and my wife has been playing with me as a Necromancer. I adjusted to using Smite with Fissure and I was using Forge Strike with Molten Ground as well, but dropped that for the reported FPS issues others were having. Now she’s having major FPS drops, like from 60 down to 7 currently. I removed Smite with Fissure and her FPS recovered. No other skill, or enemies cause these issues just the holy flame, from the stacked fissures.

Her laptop specs include an Intel i7 10750 and an Nvidia Geforce 2060.