under KPI I'd like to be able to see how many GCDS you used vs how many gcds existed in the encounter.
add up hammer of wrath, templar's verdict, final verdict, crusader strike, Execution setence, divine storm, judgement, exorcism, sacred shield casts for how many gcds were used. / how many seconds were in the fight (I'm not 100% on gcds pretty haste lowers it still)
and then holy power generated/holy power spent
generators: hammer of wrath, crusader strike, judgement, exorcism. amount of casts / templar's verdict, final verdict, divins storm times 3.
The only problem is you have to account for empower divine storm procs.that make it free..