First, Is OAS OAV?This year I used nothing but OAS, but it was exhausting for me, and unsustainable, in the summer. Next year I’m considering using Apiguard once more, since it can handle the hot temps in Tn.
Me, I choose OAD after a fall treatment of Apivar. Next season I am going to move to something other than Apivar for treatment after supers are off. Last season I did three total treatments OAD broodless in July, Apivar in August and a broodless OAD in Oct.
I also make sure to do an OAD at every brood break opportunity and if I do a split I make sure it is done in a manner that allows both parts of the split to have a brood break and they both get a dribble at the appropriate time. Granted, some hives end up with less honey production but IMO everything has a payoff, it just depends upon what you see as a reasonable one.
Caveat, I am no expert but like you I find the OAV would be impossible to keep up with.