Only Parallax

[ENBSeries]

It is impossible to have parallax without performance loss, to compute it and fix bugs required to process it, mod must do extra job. I can only suggest to do these setup:
enblocal.ini
[GLOBAL]
UseDefferedRendering=false
[PERFORMANCE]
SpeedHack=false
EnableOcclusionCulling=false
[ENGINE]
ForceAnisotropicFiltering=false
ForceLodBias=false
[LIMITER]
WaitBusyRenderer=false
EnableFPSLimit=false
[ANTIALIASING]
EnableEdgeAA=false
EnableTemporalAA=false
EnableSubPixelAA=false
[LONGEXPOSURE]
EnableLongExposureMode=false

enbseries.ini
not sure about this one, if it cut off parallax fix or not, try it
[EFFECT]
UseOriginalObjectsProcessing=true
[EFFECT]
UseOriginalPostProcessing=true
EnablePrepass=false
EnableBloom=false
EnableLens=false
EnableAdaptation=false
EnableDepthOfField=false
EnableDetailedShadow=false
EnableAmbientOcclusion=false
EnableSkyLighting=false
EnableImageBasedLighting=false
EnableReflection=false
EnableSunRays=false
EnableSunGlare=false
EnableSoftParticles=false
EnableParticleLights=false
EnableSubSurfaceScattering=false
EnableWater=false
EnableUnderwater=false
EnableCloudShadows=false
EnableVolumetricRays=false
EnableProceduralSun=false
EnableMist=false
EnableAutomaticAmbientCalculation=false
EnableRainOcclusion=false
[SKY]
Enable=false
[SHADOW]
ShadowCastersFix=false
UseBilateralShadowFilter=false
ShadowQualityFix=false