I use the Click Castsequence macro's.

My pallies is something like this:

#show Holy Shield
/stopmacro [mod:alt]
/click BottomLeftActionBarButton10

Then I have my 96969 macro on that button.

For my shammies I have a three stage macro, using the Click Castsequences.
Something like:

#show Lava Burst
/click BottomLeftActionBarButton10
/click BottomLeftActionBarButton11
/click BottomLeftACtionBarButton12

With Flame Shock on 10, Lava Burst on 11 and Lightning Bolt on 12.

At your level, Flame Shock on 10 and Lightning Bolt on 12 would work nice.
The Click castsequence thread shows you how to have multiple sequences and basically auto refresh spells (Flame Shock every 18 seconds - or however long it lasts), by just spamming one button.

The biggest thing I like actually is the ability to have the Pally do nothing.
There isn't space in a 96969 macro for a stopmacro line.
With Divine Plea, the pally has infinite mana basically, as long as she hits things.
Her mana goes very quickly without Divine Plea.