As a general rule I dial the first, hold then other two. If I am feeling froggy, dial the second, hold under the first and over the last.
But then again I have been shooting either an H59, AMR or MPCT2 for the past 5 yrs. I am very comfortable with holding over. The center dot or the 3.2 hash is just as precise…and the above mentioned reticles seldom have me holding in space wothout some definitive horizontal reference on the target some place.
I would rather invest the few extra seconds in stability, breathing, trigger press, etc. If it takes you 2-3 seconds to take your eye off the the reticle and onto the turret, dial and back to the reticle, in this scenario thats 18-27 seconds. Not insignificant.
Even if it was three shots at each then move on, unless they are extra small, extra windy or an odd shooting position, I would still hold over.
No wrong answer….just different ways of doing it. YMMV.
ZY