presumably, that is why the "intended" entry of bard 2/druid 1/rogue 2/fochlucan lyrist allows one to finish fochlucan lyrist to 10 and end with druid +5, yielding a +16 to BAB, just enough to get the fourth iterative in time for epic.

somehow, I don't think that's a coincidence. three 3/4 BAB yielding a 4/4 BAB? feh.