Debuff limit will be changed to 16 in patch 1.7

[Ruvanal]

The Amazon Basin had a slightly different take on what is causing the Deep Breath. Basically the DB comes when the overall DPS on Onyxia drops below some threshold. When that happens is when she would do a DB on the group. This would fit in well with what Lissa listed and possibly with Mongo Jerry's case if that group had short lapse in the amount of damage being done at an early portion of that phase of the fight.