Need help with Tank Pulling macro

Ok i would like to in 1 macro

1 cast divine plea (out of combat only)
2 cast Sacred shield ( out of combat only)
3 cast Avengers shield

so i would hit the button 3 times to pull the mobs with AS ( first activating the first 2 spells) at first but while in combat and 30 sec later (cool down) it would only cast AS since i am in combat.

thanks for the help

Personally, I have each of these on their own button, drive with my pally as the active toon and don't have keybinds for these.

However, I believe [combat] and [nocombat] are valid arguments.
For reference, check http://www.wowwiki.com/Useful_macros

Maybe something like:
#show Avenger's Shield
/cast [combat] Avenger's Shield
/castsequence [nocombat, target=player] Sacred Shield, Divine Plea, Avenger's Shield

I only use AS for pulling, never in combat. DP and SS should only need to be called once barring chain pulling and long boss fights {for SS, which is going to be fairly pointless when patch hits anyway}. This macro suits me very well.

/castsequence [target=player, mod:alt] Sacred Shield; reset=combat/target Avenger's Shield, Divine Plea, Null
/startattack