For spell IDs, I use an addon (such as idTip http://wow.curse.com/downloads/wow-a...s/spellid.aspx). You will need to either mouseover the spell in your spellbook or the buff icon and read the ID from the standard tooltip. You need to be on your priest to do that, so you may need to switch windows a bit to set it up.
For using the variations of Holy Word, I am still working on a solution myself. Some variation on Mercurio's idea as shown below should work:
I'll try to update when I have something working.Holy Proc Macro
#showtooltip Holy Word: Chastise
/stopmacro [channeling]
/tar party1
/tar raid1
/click BT4Button75
/cleartarget
/use 14
Note: I put the spell Holy Word: Chastise on BT4Button75 to actually cast that spell.
Alge
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