@dussck: I play on hard too, and more and more I'm actually finding myself trusting a lot of the routine of the combat to automation. There are certain things you can trust the AI to do and certain things you should never let them do for sure. Also certain classes require more babysitting to be effective (not dumb). There are not that many cases i find where you need to move out of aoe effects, and when it's needed yea sure i'll pop to tactical and move them away, they are too dumb not to stand in the fire.
Most skills/spells that consume more then 50 mana/stamina i turn off to use manually. Crowd control abilities are also mostly on manual. Stuff like barrier/dispell can be made automatic for routine fights and manually managed on harder stuff. Generally most of my mage spells are disabled however unless they are cheap abilities I'm ok with being used constantly.
Certain stuff I do trust the AI with. Tanking is actually surprisingly effective without any input, be it groups or high dragons. I just have Cassandra set to prefer taunt and shield wall, rest of abilities set to enabled like shield bash and chain pull. No problems, tho a lot of it is due to kinda OP tanking talents like taunt giving stamina with every hit and shield wall giving nearly free invulnerability.
The main culprits that need babysitting on harder difficulties are melee rogues and 2h warriors.The AI for effective use of their abilities is truly shit, and that's where I find myself missing the proper tactical options from previous DA games the most.
Anyway most fights i just manually CC 2-3 targets at the start and from then on it's a controlled cakewalk as many CC durations are longer then their cool down timers :/ Tactics mode I use a few times per combat to adjust things how required (re CC, manual taunt, aoe nukes, dispells), but so far on hard I don't feel there is a need to spend 100% of your time in it.