Valve to valve connection

I am installing a new shower. I have a mixing valve, and then a short run to a distribution valve. they are both female pipe thread. I have toyed around with doing all soldered connections, but that doesnt let me adjust if one of the males leaks. I am thinking a compression fitting between, and that will allow to tighten the male pipe adapters if one leaks or drips at each valve. What do you guys think, or do?

Compression fittings are not allowed inside walls

I think it is a "dumb" idea. Why would you want to install something that is almost sure to leak, to avoid making a connection that "might" leak? IF the two pieces are from the same manufacturer, they might connect together with a straight brass pipe nipple, and avoid any solder joints between them.