Bind the same key to cast prowl as your rogue uses for Stealth; I use alt+4 on my rogues and 4 on my druids, pick whatever key you prefer and hotkey their stealth spells to that same key on both chars ;p

Keyclone also must be bought before it'll pass the keys, just fyi as you didn't mention anything beyond downloading it; as for the healing bit that's a bit more complicated, and there's multiple ways to do it from the same basic way you would(hit F2 to target the rogue if you're alone in a group then press the heal hotkey, being aware that you may push that key on the rogue too), or complicated /cast heal target=etc macros that I have no clue about and you'll have to figure out yerself lol