Can I set it so the "Phone" on my phone takes priority over all other apps?

Every once in a while my phone gets very sluggish when I'm multitasking, which is annoying but fine. Is there any way for me to set it so that the Dialer app takes priority over everything else, quickly stealing whatever resources it needs to run as fast as possible? Also, I am aware of the plethora of task killers available but I'm not interested unless it specifically allows me to set the dialer as a VIP or in some way make sure that the dialer gets first dibs on resources. Unrooted Moto Droid on 2.2