In about fifty years of doing boat electrics and all of the last ten before the depression ended the profit side of the work, I never put more than two lugs on a battery post. More than that and you are asking for trouble down the way. If you sit down with a paper and pencil and draw out the plan, you can get all of the jars connected and never have more than two connections on a post and also have the same number and length of jumpers in each string. This may sound stupid, but the balance of a multi-string bank can be upset by milliohms in one string.
If you need a sensor lead to the bank or other very low drain attachment, don't put in on the bank directly, attach it at the other end of the feeder cable where it will not be subject to the corrosion and include a fuse.
Matt