If the static effect causes other shaders to run faster than usual, there is a problem with the static effect. We'd rather fix that than provide a workaround.
It would be great if you could provide a compiled shader that runs faster when used in combination with the static effect.
I usually put the Stop Motion (and LoRez) effect over the static for shaders. ShaderToy shaders use small noise still images. The images are here http://shinythings.tv/shadertoy%20textures.zip
Works for slowing them down, but stop motion makes them skip around. LoRez makes the lava look pretty cool though. I tried using the images from ShaderToy before but it doesn't produce the smoke on Hell, maybe that's a shadertoy issue?