Games : Is waiting for Baron Nashor's buff on enemies to dissipate still viable?

When the buff still applies to the champions, it is okay to pass some time and face enemies without the additional stats.

But now, since the buff affects the minions, is it still advisable to wait for the buff to disappear if :

• the enemy has the buff.


• the scores are even.


• both teams still have 3rd tower on all lanes.


• considering that they're most likely to go all in 1 lane.

I mean should we defend and wait for the end of the buff or make some isolated kills to remove their buff?