As to the activation, you use Dichlor. Always has been that way.
Otherwise, if what you've been doing is working, why change it?
Personally, I use MPS when I use the spa and I superchlorinate with Dichlor based on how much I'm using the spa. If I'm using regularly, at least once a week. If I'm away a bit and not using so much, I back off on my Dichlor.
I find the combo of ozone, silver and MPS works quite well for me.