If it would be possible a change action bar 2 then you would be able to easy make a macro changing both bars a at time. But for now you can only set action bar 1 with macro's. But that still gives you 40 skills at any time on your screen until 6months ago or so we didn't even have action bar 2 so we had to live with 20 skills on screen and macro's. Just use action bar 2 for your protections and auras and make some macro's that make it easy to switch action bars fast.
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