Formula and Filter improvement, ZScore on many fields

[GoldenDesign04]

I have a workflow where I am reviewing call center call records by disposition and creating Stdev and Z-scores to establish outliers for the call center. 
The workflow uses the 335 standardized call dispositions, creates an average and Std Dev (from the Summary tool). The I use formulas to calculate the Z-Score ( z = (x-μ)/σ ) and then followed up with a filter to pull only the top and bottom 98% (z-score above 2.00 and below 0.01)

The way I've done this is overly complicated and if we revise the bounds or have dispositions renamed, it will be rather a bother to constantly have to adjust. Looking for suggestions on how to improve this.

[DataNath]

Is this something the Z score macro may help with? In terms of making things more dynamic/less of a hassle to deal with change:

https://community.alteryx.com/t5/Alteryx-Designer-Discussions/Z-Score-Macro/td-p/476366

[GoldenDesign04]

Thanks for the suggestion. I'll look at it. But I don't think this will help as the macro seems to take in a single field for each variable(3). While I have 3 variables for each possible call distribution.Meaning I'd need to still have 30+ of these macro tools and if the names change, I'm still redirecting the macro.