Basically one monk would fd after pulling  a couple mobs..when mob ran/walk(walk in eq1 mainly)the monk would stand re agro then fd again..eventually one of the mobs would  be far enough away where you could safely grab it and bring it.
We generally played with 1 mob till we got seperation is all. This was mainly used in group setting and sometimes took a little time.Lull was always a option but most groups felt the risk was not worth it as lull when failed mobs would agro everytime on resist
However it was always faster with 2 or more monks in a raid setting because one could agro one or 2 other mobs and pull them away from the one the other monk would pull.

I understand the issue, lets say the ranger class lead sandbaged the tests, and didn't go all out, or didn't use a fighting style representative of all rangers.  Now the classes will be balanced based on a sub par rangers dps.  So monks may only get a 15% boost to dps when we really needed a 25-30% boost.