Easyest class to use for healer

[Liam_Harper]

a group heal
/ac "Plenary Indulgence"
/ac "Afflatus Rapture"
/ac "Medica"
/micon "Medica"

I'd slot Medica II in above Medica, once you get Medica II it's straight up superior in most cases. Also wouldn't hurt to slot Asylum <t> and Assize in there too, perhaps with a 1 sec /wait after Dia. Another option is mouseover for single target healing and then Glare/Dia don't even need a macro and he can just keep the boss targeted the whole time.

Remember to repeat the important lines as many times as you can fit into the macro to reduce the chance of the macro failing. You can also use:

/ac "Swiftcast"
/wait 1
/ac "Raise" <2>
/ac "Raise" <3>
/ac "Raise" <4>

...too, so that he doesn't even need to click the Raise target (add more lines if you're doing 8 man content). Good luck and hope he enjoys the game