So I finally did my first AB with 4*shamans at level 43.. obviously I was quite humiliated by 49 twinks who were very skilled and so on, BUT I did gain some wisdoms in macroing.

I present my attempt at the ultimate casting macro (requires use of focus for assisting):

Code:
/cleartarget [noharm]
/cleartarget [dead]
/targetenemy [target=target,noexists] 
/cast [target=focustarget, exists, harm, nodead] [harm] Chain Lightning; Chain Lightning
The whole idea behind the macro is alleviate the difficulties with your main's target lag in tight situations where you are switching target frequently and need to output high amounts of dps.
It executes like this:
  1. If my current target is friendly, clear my target.
  2. If my current target is dead, clear my target.
  3. If I don't currently have a target, then target an enemy.
  4. If my main has a valid enemy target, cast on that target, otherwise cast on my current target if it is an enemy.

Pros of this macro:
  • You will always start casting quickly and output high damage, even if some spells might be cast on other targets than your main's. This ensures maximum dps output against a group of enemies.
Cons of this macro:
  • You will sometimes lose focused dps if you spam casts too quickly after switching target on your main. However, as a shaman in BGs this is not a great problem - usually you will want to output high dps on several targets and do chain lightning as soon as it is up.