@Logicfest -- The best thing a lawyer can do is to make sure a probate fight can't pop up in the first place. How? When someone comes in to make out a will, set up a good old trust instead. Meanwhile, an attorney can advise his or her client to make all financial accounts "payable on death" to beneficiaries.
If all assets are in a trust or are to be distributed to people on the death of someone, then there will be no assets to probate and that will keep fighting to a minimum.
If there is a fight, at least it won't take place in a lawyers office where survivors are shrieking at each other.