I just hit 60 with my 5 shamans, and yesterday insta-levelled a paladin to 61 to use as a tank in instances, so I'm finding this post very interesting.

I have a question about your macros. The tank macro is:
/castrandom seal of righteousness , judgement, holy shield, consecration

Why is it a /castrandom instead of a /castsequence? Is it something to do with spell cooldowns?