wow thats alot, how many eneloops do you have!
I only have 3 580 exii
i also have 3 yongnuo battery packs for them
then i have 24 AA eneloops for each flash so i can do a full change if needed
I usually only use 3 at a time, although sometomes I have the key light with a triple head and a 5foot shoot through which is why I need 5
Using all this number of speedlights means that each shot takes a small amout of power, so the batteries last longer and the recycle time is short - so on the 1D4 I can take 3 or 4 on high speed.
I have a charging box which has 6 chargers all with spares (dont forget the extras for the PW) - I plug this in to a plug on site so I always have fresh spares on hand - box also includes a double charger for the camera batteries.