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Brew,I certainly test for total Cl but, like my other tests, only once a week. With the ozonator and mineral filters, I find that shocking on a regular basis isn't as necessary as without them so I compute combined Cl before making a decision to shock. For me, it keeps me from adding more MPS or dichlor than I need. But, compared to the other measures, total Cl is the one I could live without if I had to.
I do the same...test for total Cl once per week and shock if necessary. I rarely need to shock weekly. FWIW, I rarely check free chlorine....except when I do my weekly check of total chlorine, but I only do that when my free chlorine would be zero...so I don't think that counts.