Senthiele

Checkout the wiki (linked at the top of the page) there are Hardware and software solutions in there but perhaps more appropriate for you, there is a comprehensive macro section.

I would suggest using your warrior as your main and having all your heals, dots and buffs set up on macros (or check out the macro free focus thread). The either bind these macros to keys not used on your warrior, or setup a keymap in keyclone to redirect unused keys on the warrior to the used keys on your priest.