I disagree about the manually hitting all the buttons.

I have 1 castsequence I use and I never have to manually use any standard attack abilities to generate aggro, except one. Death and Decay. Coincidentally Death and Decay is also your instant-aggro ability. If I lay this down at the start of a fight I can start DPSing instantly afterwards, no need to wait at all. Generally thats how I start my fights - death and decay followed by spamming my tanking castsequence and then I never need to hit another button