This is what i am presently using in a normal Macro at level 47:
#showtooltip
/targetenemy [noharm][dead]
/castsequence reset=target Seal of Light, Judgement, Seal of Wisdom, nul
/startattack
/cast [combat] !Holy Shield
/castsequence !Mana Tap, !Arcane Torrent
With it written like this I can spam the button with no errors or lockups. and it will cast Holy Shield every 10 seconds.
I have Exorcism, Consecration(I use as soon as i have cast Holy Shield) and Hammer of Wrath bound seperatly.
and my OHShitz button:
#showtooltip Divine Protection
/castsequence reset=8 Divine Protection, Blessing of Light, Holy Light, Flash of Light, Blessing of Wisdom
Hope this helps someone 