BKB with naga song

Is it better to have a bkb against a naga siren if only one other teammate or just you for that matter have one? You stop the massive initiation capabilities of the song, but you put yourself at rish of being melted by the 5 opposing team members and leaving your team a man short. I have seen it happen. Is the bkb strat against naga only effective if your whole team has, or at least three of you, or should you forget the bkb and just suffer the setup wombo combo?

It's worth for some heroes, like Enigma or Tidehunter for example, they can just stop everything and your team finishes off.

I think it's not so much that BKB should be used BEFORE Song.

If you're asleep, and about to be Wombo Combo'd, why not spam your BKB hotkey so you take little to no damage after it? I feel that's the optimal time to BKB against a Song when used as a set up. Otherwise, you find yourself in a 5v1.

Yeah, BKB is good before song if you're playing a hero with an AoE stun like Enigma or Earthshaker.

BKB is good after song to prevent yourself from instantly dying as the rest of the enemy team gets into position.

A good example of this is when Navi's Light.Of.HeaveN got BKB on Enigma, and just completely turned to tides if the fight in their favor.

I guess if someone who can interupt the song or completely reverse the setup it would be very beneficial. Thx. Enigma seems to be the only person who could farm that fast enough