If you are already running a TVPRAMP1R, I doubt you will need any more amplification. Still, if you add a splitter to your system and then find you truly have low signal levels that cause visible reception problems, I'd try adding the CM-3410 just upstream of the splitter... Leaving the TVPRAMP1R in place.
There are a few cases that call for more than one amplifier in the system. But these situations are not common. Here's a very unusual case...
http://forum.tvfool.com/showthread.php?t=13659