I would look at overhead support only at each flange of the mixing valve, to keep it simple and a clean install, and look into steel braided (or whatever) flexible discharge line to the boiler, if compatible with chlorine. The pump might appreciate it's own support. I would stray away from supporting too much weight with the copper piping.
I get what you’re saying and while I think it’s supported pretty well.. yes the motor/pump and mixing valve are pretty heavy. It’s worth looking into..
Different layout here but same system and used strut to directly support the pump assembly
She never made it past the bedroom door, what was she aiming for...? She's gone shootin..