enter code hereIt wouldn't be a bad idea but there are better alternatives.
Power Swap switches any changes to the user's Attack stat and Special Attack stat with any changes to the target's Attack stat and Special Attack stat.
If you want to lower your opponents Sp.Atk it's a good choice but if it's a physical attacker anyways some other alternatives to not lower your stat would be better, such as White herb.
But sure, you could run that, it's not that bad of an idea.
Hope I helped.